Question

(y^2+5/7) (y^2-5/7)
$( \frac{1}{2} x \frac{2}{3}y) ^{2}$

Answer 1

don't know.............

Answer 2

➡HERE IS YOUR ANSWER⬇

$( {y}^{2} + \frac{5}{7} )( {y}^{2} - \frac{5}{7} )( { \frac{1}{2}x \frac{2}{3}y) }^{2} \\ \\ = ( {y}^{4} - \frac{25}{49} )( \frac{1}{4} {x}^{2} \frac{4}{9} {y}^{2} ) \\ \\ = \frac{1}{9} ( {y}^{4} - \frac{25}{49} ) {x}^{2} {y}^{2}$

⬆HOPE THIS HELPS YOU⬅