Question

Find the solution set

2x^2 -2x -4 =0

please use a comma to separate your answer.

Answer 1

2,-1

Explanation:

2x^2 -2x -4 =0

Factor out a 2

2(x^2 -x-2) =0

What 2 number multiply to -2 and add to -1

-2*1 = -2

-2 +1 = -1

2(x-2) (x+1) =0

Using the zero product property

x-2 = 0 x+1 = 0

x-2+2=0+2 x+1-1=0-1

x=2 x=-1