Question

ache a raíz 4x ao quadrado - 64 = 0

Answer 1

4x² - 64 = 0
x² = 64/4
x² = 16
x =√16
x = -4 ou 4
V = ( -4, 4 )

Answer 2

$4x^2 - 64 = 0 \\ 4x^2 = 64 \\ x^2 = \frac{64}{4} \\ x^2 = 16 \\ x = \sqrt{16} \\ \\ \boxed{x = \pm4}$