Question

mim ajudem pessoal.

Answer 1

A) (2x)² = x² + (3√3)²
4x² = x² + 9 . 3
4x² - x² = 27
3x² = 27
x² = 27/3
x² = 9
x = √9
x = 3

B) (x + 5)² = (x + 3)² + 6²
(x + 5) . (x + 5) = (x + 3) . (x + 3) + 36
x² + 5x + 5x + 25 = x² + 3x + 3x + 9 + 36
x² - x² + 5x + 5x - 3x - 3x = 9 + 36 - 25
4x = 20
x = 20/4
x = 5