Question

As raízes da equação 9x² - 12x + 4 = 0 são:


A) S = {- 2/3; 2/3}

B) S = {- 2/3; - 2/3}

C) S = {2/3; 2/3}

D) S = {0; 2/3}

Answer 1

9x² - 12x + 4 = 0

(3x - 2)² = 0

3x - 2 = 0

3x = 2

x = 2/3 ===> C) S = {2/3; 2/3}