Question

qual a resposta de X×X-64=0

Answer 1

x.x - 64 = 0
x² - 64 = 0
x = √64
x = +8 ou -8

Answer 2

X × X - 64 = 0
X × X = 64
X² = 64
X = √64
X = +- 8

R: X = 8 e X = -8