Question

Resolva a equação (x + 7)2 = 100

Answer 1

Explicação passo-a-passo:

$\sf (x+7)^2=100$

$\sf x+7=\pm\sqrt{100}$

• $\sf x+7=10$

$\sf x=10-7$

$\sf x'=3$

• $\sf x+7=-10$

$\sf x=-10-7$

$\sf x"=-17$

$\sf S=\{-17,3\}$