1) x^2+9=(x+9)^2 2) (x-1)^3=-8.

Question

1) x^2+9=(x+9)^2

2)

(x-1)^3=-8.

Answer 1

1)
x^2 + 9 = x^2 + 18x + 81
18x = 9 - 81
18x = -72
x = -4

2)
x - 1 = -2
x = -1