Question

X2 + 2 = x + 8, {1, 3, 4, 5}

Answer 1

X^2 + 2 = x + 8
x^2 - x + 2 - 8 = 0
x^2 - x - 6 = 0
(x + 2)(x - 3) = 0
x = -2 or x = 3