Question

resolva 3 (x²-1)= 24

Answer 1

3 (x² - 1) = 24
x² - 1 = 24/3
x² = 8 + 1
x² = 9
x = ± √9
x = ± 3

x = 3, x = - 3

Answer 2

3x^2 -3 = 24
3x^2 = 27
x^2 = 9
x = 3