Question

(x-2)ao quadrado=3x+4

Answer 1

(x-2)² = x²+4x+4
portanto
(x-2)² ≠ 3x+4

Answer 2

(x-2)²=3x+4
x² - 4x + 4 - 3x - 4 = 0
x² - x  = 0
x(x - 7 ) = 0
x1 = 0

x2 - 7 = 0
x2 = 7