Question

Resolva a Equação, x^4 - 16x^2 = 0

Answer 1

$\boxed{{x}^{4}-16{x}^{2}=0}$

${x}^{2}({x}^{2}-16)=0$

${x}^{2}=0$

$x=\sqrt{0}$

$\boxed{x=0}$

${x}^{2}-16=0$

${x}^{2}=16$

$x=±\sqrt{16}$

$x=±\sqrt{16}$

$\boxed{x=±4}$

S={-4,0,4}