Question

Se x= -3,qual o valor dex²​

Answer 1

x = - 3

x² = (-3)² = (-3) . (-3) = + 9

Answer 2

$\sf x=-3\:para\:x^2\\\\\\\\\large{\boxed{\sf Para\:x^2\:substituir\:x\:por\:-3}}\\\\\\\\\sf \left(-3\right)^2\\\\\\\\\boxed{\sf Aplique\:as\:propriedades\:dos\:expoentes\iff\quad \left(-a\right)^n=a^n,\:\quad se\:n~\acute{e}\:\:par}\\\\\\\\\sf \left(-3\right)^2\to3^2\\\\\\\\\sf \boxed{\sf S_1=\{9\}}$