Question

calcule: $\sqrt{$ y elevado a 4

Answer 1

$(\sqrt{y})^{4}= \sqrt{y^{4}} = y^{ \frac{4}{2} } = y^{2}$

Espero ter ajudado.

Answer 2

$\sqrt{y}^{4} = y^{ \frac{4}{2}} =y^{ 2 }$