SOLUTION: I have problems with factoring when it comes to quadratic equations, for example when you do 6x^2 + 7x =3 6x^2+3+7x=0 X^2+3+42x=0 Then you have to find factors of 42 in order

Algebra.Com
Question 813882: I have problems with factoring when it comes to quadratic equations, for example when you do
6x^2 + 7x =3
6x^2+3+7x=0
X^2+3+42x=0
Then you have to find factors of 42 in order to put it in the form of (x+_) (x+_)
I don't know what factors add up to 3 and multiply to 42
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 

Hi,

6x^2 + 7x = 3

6x^2 + 7x - 3 = 0   |Subtracting 3 from both sides of the EQ

(3x -1)(2x +3)= 0    | Note:SUM of the outside terms(9x) and the inside terms(-2x) = 7x

The Idea is to match Up the -1 and 3 with the 2 & 3 so one gets that 7x

Checking the factoring Using FOIL

F	First terms 

O	Outside terms  9x

I	Inside terms  -2x

L	Last terms    -3



 

RELATED QUESTIONS


 How do you solve a quadratic equation by factoring when it isn't equal to 0?

Problem... (answered by Earlsdon)

I am stumped in trying to solve a couple of problems, please help.I tried using the... (answered by Fombitz)

In the following problem I am trying to solve for x but something isnt working right when  (answered by jim_thompson5910)

How can you identify the proper way to follow for the equation?
out of these ways:

1.  (answered by jim_thompson5910)

X^3-7x^2-6x+3=0 (answered by josgarithmetic)

x^3-6x^2+7x+2=0 (answered by Alan3354)

I am having trouble getting started on these problems. Can someone please help?
Thank... (answered by jim_thompson5910)

Hi,

Can someone please help me with the following:

I have two equations that I need  (answered by jim_thompson5910)

1.) Determine whether the following equations have a solution or not? Justify your... (answered by jim_thompson5910)