Question

BT1: Tìm x, biết:

1) \(\left(3x^2-32\right)^3=-125\)

Answer 1

Ta có:

-125=-5³

suy ra 3x²-32=-5

3x²=-5+32

3x²=27

x²=27:3

x²=9

x²=3²

x=3

Vậy x=3