Question

13. (x4 + y4 )*(x2- y²)​

Answer 1

$\huge \bf{( {x}^{4} + {y}^{4} )( {x}^{2} - {y}^{2} )}$

$\sf = > {x}^{4} ( {x}^{2} - {y}^{2} ) + {y}^{4} ( {x}^{2} - {y}^{2} )$

$\sf = > \red{ {x}^{6} - {x}^{4} {y}^{2} + {y}^{4} {x}^{2} - {y}^{6} }$