Question

Solve –3x^2 – 4x – 4 = 0

Answer 1

-3x^2-6x+2x-4 =-3x (x-2)+2 (x-2) =(-3x+2)(x-2) -3x+2=0 X=2/3 X-2=0 X=2 Hope it helps! !!!!

Answer 2

 3x^2 – 4x – 4 = 0



multiply the first coefficient by the last coefficient: 

3 x -4= -12 

Now think, what adds to the 2nd coefficient (-4) and multiplies to -12? 

-6 and 2 

rewrite your equation: 

3x^2 - 6x + 2x - 4 <==== this is essentially the same equation 


now split it... 

3x^2 - 6x 

AND 

2x -4 

factor each one so that both share a common factor: 

3x(x-2) 

AND 

2(x-2) 

Now combine them: 

(3x+2)(x-2)