Question

resolva as equações
x²-25=0

Answer 1

$Resolu\c{c}\~ao\to \left\{\begin{array}{ccc}x^2-25=0\\\\x^2 = 25\\\\x = \pm \sqrt{25}\\\\x = \pm5\\\\\boxed{\boxed{S = \{-5,5\}}} \end{array}\right$

Espero ter ajudado. :))

Answer 2

x² - 25 = 0
x² = 0 + 25
x² = 25
x = ± √25
x = ± 5