Question

Solve: x2 - 20x + 36 = 0 (Points : 1)
{6, -6}
{2, 18}
{-4, -9}
no solution

Answer 1

just substitute each x value

e.g 6^2 - 20(6) + 36 = -48
-6^2 - 20(-6) + 36 = 192