All questions on Maths

HELPPP

Solve:

3x(x+4)+3(x+4)=0

Emma

Answers

If you need further help, feel free to contact me for tuition services

Kasim A.

13 April 2017

First, expand the bracketsSo 3x^2+12x + 3x+12 =0Then simplify it all out - ax^2+bx+c=0 is the format you want the question in to solve3x^2 + 15x +12 =0This is the same as 3(x^2+5x+4)=0Now you need to find 2 numbers to multiply to make 4 (c in the equation) that also add to make 5 - 1 and 4.Therefore x=-1 and x=-4Check it in the equation and see if it equals 0, if it does it's right

Kasim A.

13 April 2017

expand the brackets3x^2 + 12x + 3x + 12 = 0Gather like terms3x^2 + 15x + 12=0simplify by dividing the whole equation by 3x^2 + 5x + 4 = 0Factorise (two numbers that added give you 5 and multiplied give you 4)(x+1)(x+4) = 0Thus, the two solutions are x=-1 and x=-4

manfred.olbrich

17 April 2017

given the equation, we can say that we have (x+4) in common.So, we take that out, (x+4), we will have another bracket, (3x+3).We can say that (x+4)(3x+3)=0now we can equate, we can say either (x+4)=0 or (3x+3)=0 x=0 -4 or 3x=0-3 x= -4 or x=-3/3 x=-4 or x=-1

shahnaaz1309

21 April 2017

Browndaisha !simply remember in math there is rule of DMAS. it says 1. Division,2 Multlipication,3.Addition and 4.Subtraction. in any equation follow these steps.you will get result.

mijaz

27 April 2017

3( x+4)(x+1)=0X= -4, -1

shabanam1982

04 May 2017

3( x+4)(x+1)=0X= -4, -1

shabanam1982

04 May 2017

Firstly take the bracket of (x+4), if x+4=0 then x must be equal to -4.The other numbers make another bracket of (3x+3). If 3x+3=0, then 3x=-3 and so x is equal to -1

libbydale1

04 May 2017

3x(x+4) = 3x^2 +12x3(x+4) = 3x + 12So: 3x(x+4) + 3(x+4) = 3x^2 +12x + 3x + 12 ----> just expanded the brackets Therefore: 3x^2 +12x + 3x + 12 = 0Simplify it to: 3x^2 + 15x + 12 = 0Factorise to get: (3x + 3) (x+4) = 0Therefore: (3x + 3) = 0 or (x+4) = 0If: 3x + 3 = 0 --> 3x = -3 so x= -3/3 = -1If: x+4 = 0 ---> x = -4x = -1 or -4Hope that helped!

gsethunath

06 May 2017

3x(x+4)+3(x+4)=0(3x+3)(x+4)=03(x+1)(x+4)=0x+1=0 and x+4=0x=-1 or x=-4

sudarsan

14 May 2017

Let's solve your equation step-by-step.3x(x+4)+3(x+4)=0Step 1: Simplify both sides of the equation3x2+15x+12=0Step 2: Factor left side of equation.3(x+1)(x+4)=0Step 3: Set factors equal to 0.x+1=0 or x+4=0ans:x=−1 or x=−4

amitesh

09 June 2017

Add an answer

24n = 120. What is n?

Emma

25c^2+10c+1

Emma

2x+5=x^2

Emma

Can you explain how to solve 4(y+1)=2(y-2)

The numbers in brackets are powers

Emma

Differential Equations

Solve (D2-3D+2)y =x(x+4) and show that its general solution is given by y=Aex + Be2x +(x2/2) + (7x/2) + (19/4)

My work :

auxiliary eqn , m2 - 3m + 2= 0 m=1 , m=2

Reduced eqn : yn = Aex + Be2x

P.I. = 1/f(D)F(x) = (1/(D2-3D+2))(x(x+4))

P.I. = [(x2+4x) + ( (1/2)( 2- 3(2x) - 3(4) ) ) + (1/4)(92) )

P.I. = x2 + (4x/2) - (6x/4) - (5/2) + (18/4)

P.I. =(x2/2) + x + 8/4

General solution : y= Aex + Be2x + (x2/2) + x + 8/4

Could anyone point out my mistakes?

Emma

differentiate f(t)=2-(2/3)t

Emma

Differentiate with respect to x and simplify your answer

y= x2 (2x+1)1/2

Emma

Equations

Solve for f(x) , [f'(x)]^2 + 6f(x)[f'(x)] + [f(x)]^2 = 0

Emma

Equations: point slope

find the equation of the line below arrange your answer in the form y=mx+b where b is constant (-2,2) (2,2)

Emma

Find all real solutions of this equation.

x4/3 - 102/3 +21=0

Emma

find the equation of the tangent line to (e^xy)+(x^2)-(y^2)=5 through the point (2,0)

Emma

Find the value of x

find x = 2(3x×x)+(2x×)=14400

Emma

find the value of x (solving linear equations)

9x+5=7x+11

Emma

f(x)=3x^4+9e^x^6

Emma

f(x)=cos(3pix-(pi/2))

Find the set on which the function is continuous (in all cases, the domain). Do so analytically, identify the type of function and the appropriate algebraic rule for determining domain.

Emma

Given y=-7sin2/3(x-60)+4

Find what y will be when x=40 degrees 2) Sketch the curve for one positive and one negative cycle and then on your graph determine the x value when y is 9

Emma

Golf Balls Equation

dimmsdale discount golf supply sells titleist golf balls for 60c each, the nike golf balls for 94c each and the Calloway golf balls for $\text{[math]}$ 140.50, how many golf balls of each kind were bought?

Emma

Graph the linear equation and plot intercepts

-4=8x+y

Emma

Help!! step by step answer to solving this inequality!! (Further maths as)

5x+3/4x-7≥2, can anyone solve this inequality and show the step by step method of doing it, Many thanks!!

Emma

Hi could you help me with this sum

what is 1cmx1cmx1cm im mm2?

Emma

hi how can i do this

3x⁴-2x³-5x²-4/x²-4

Emma

HOW CAN I SOVLE QUADRATIC SIM EQUATION

HOW CAN I SOVLE QUADRATIC SIMTENEOUS EQUATION

Emma

how do i figure out x2+7x+10=0

Emma

how do i find the gradient of the equation y= 3x - 2

please can you give me a step by step guide

Emma

how do i solve

2(3x+8)=-23+9

Emma

how do i solve 2(3b - 7) = 4 by expanding brackets?

Emma

how do I solve simultaneous equations

3x+y=7 2x+y=6

Emma

how do quadratic equations work?

Emma

How do you derive a quadratic?

Eg. 4x2 + 3x - 8?

Emma

how do you do 2 step equations

like i dont get how to do this problem:3y-4=2

Emma

how do you do quadratic equations?

Emma

how to determine the concavity, x-intercpt and y intercept

f(x)=-3(x+5)(x-11)

Emma

how to factor 6y^2=29y+9

Emma

How to solve equation ln(x)=ln(x+2)-1

Emma

how to solve the following equation

How to solve (3x-4)=(4x-3)2

Emma

how to write two expressions for t+3 one in brackets and another without brackets

i've got to............ write down 2 expressions for the perimeter of a square one with brackets and another without brackets of t+3

Emma

I need help understanding Solving One-Step Equations Using Multiplication and Division of Fractions

Emma

Integration of curves with polar equations

Consider the curves given in polar coordinates by:

r=1+sinθ and r=1+cosθ. Find the area in the region of the first quadrant outside r=1+sinθ and inside r=1+cosθ

Emma

Linear equation.

If george is 378 of the age of his brother, and in 4 years he will be 1/2 of the age of his brother. What is the age of the brother?

Emma

MATH

Solve the simultaneous equations: x2 +2 y2 = 8 and x + 2y =8

Emma

My question is y=4x, and y=2x+6

I need help with this please help?

Emma

N+N=30 what is the number for N

Emma

nth tems

Emma

simultaneous equations

2x - 3y = 21 5x + 2y = 5

Emma

simultaneous equations

A gas bill consists of a fixed charge (£F) and charge (g pence) for each unit used. Mrs Ali used 350 units and paid 30 pounds. mr hill used 450 units and paid £35. find the fixed charge and the charge per unit.

Emma

Simultaneous Equations

How would you solve x^ + y^ = 25 y - 3x = 13

Emma

Simultaneous equations

x2 + 2xy = 5 x + y = 3

Emma

Simultaneous equations help

Hi, I need a bit of help on how to solve the following. y = -4x + 4 y = x2 -6x - 8 I have tried to substitute equation one into equation two ( RHS must be equal) to give -4x + 4 = x2 -6x -8 I have then added all like terms to give but im then stuck and I think i have got the method wrong. Bit confused due to x2 and y = as I thought i did understand how to solve these so im now annoyed. x2 -10x -4 Any help on how to solve this would be helpful. Thanks

Emma

Simultaneous equations with quadratics

I really need help with topic. I don't get it at ALL. this is one of the questions used in class:- y=2x-1. y=x2 (Both x and y equal to 1 I just don't understand how or why) please explain

Emma

so confused

Sorry here is the problem 8x-(3x+10)=34

Emma

Solve for x

how do i solve x for (2/x+3)=9/4=5 and none is in parenthesis.

Emma

Solve for x

(X-2) over 3 + 1 = x over 7

Emma

Solve for x

3x-2=-29 6+1/2x=4 X/10+4=5 5x+3+x=75

Emma

solve for x

4(8-x)=40

Emma

Solve for x. 50 - 32 % =x

Emma

solve the equation

3x+2 -------- + 3 = 4 thank you ,:) x-1 the ---- is meant to be divided or over (:

Emma

solve the equation

7-(x+1)=9-(2x-1)

Emma

solve the simultaneous equations, anyone help please?!

Emma

Solve this system of equations using the addition method.

x + y = 8 x - y = 2

Emma

solving equations

equation: 23-4x=-9 ——- 2

23-4x=-18 is the next step then -4x=18-23 -4x=-18-23 -4x=-41 can i get a step by step answer on how to conver this into x=41/4

Emma

Solving equations How do you do 2p-1=13

please can i have help im really stuck , thanks.

Emma