Question

Responda a equação
ײ-100=0

Answer 1

$x^2 - 100 = 0 \\ x^2 = 100 \\ x = \sqrt{100} \\ \\ x = \pm10$

Answer 2

$x^2-100=0 \to\\ x^{2} = 100\to\\ x=\pm~ \sqrt{100} \to\\ x=\pm~10\\\\ \large\boxed{S=\{-10~;~10\}}$