Question 423757
2x^2-16x+20=132

2x^2-16x=112

/2
x^2-8x=56
x^2-8x+16=56+16
(x-4)^2= 72

take the square root on both sides
(x-4)= +/-sqrt72

x= 4+sqrt72 =12.48
OR
x=4-sqrt72 = -4.48