how do i solve this? how can i simplify it?
$(\sqrt{7x} - \sqrt{2y})^2$
how do i solve this? how can i simplify it?
$(\sqrt{7x} - \sqrt{2y})^2$
In general, $(a - b)^2 = a^2 + b^2 - 2ab$. So here, we get that $(\sqrt{7x} - \sqrt{2y})^2 = 7x + 2y -2 \sqrt{14xy}$. Unfortunately, there is nothing to 'solve' since that would require there to be some constraint, e.g. $(\sqrt{7x} - \sqrt{2y})^2 = 0$. But this is a simpler form.