Question 754217
What is the value of x is this equation 2x(2x-1) = 4

2x(2x-1) = 4

4x^2 -2x = 4

divide both sides of = by 2

2x^2 -x = 2

2x^2 -x -2 = 0

now use quadratic formula

1 plus or minus sqrt(1 - 4*(2)*(-2))  / 2*2
1 plus or minus sqrt(1+16) / 4
1 plus or minus sqrt(17) / 4

x = (1 + sqrt(17)) / 4 = 1.28
x = (1 - sqrt(17)) / 4 = -.78