Question

только второй пример

Answer 1

$( {a}^{2} + {b}^{2} )( {a}^{4} - {a}^{2} {b}^{2} + {b}^{4} ) + ( {a}^{3} - {b}^{3} )( {a}^{3} + {b}^{3} ) = 2 {a}^{6} \ {a}^{6} + {b}^{6} + ( {a}^{3} - {b}^{3} )( {a}^{3} + {b}^{3} ) = 2 {a}^{6} \ {a}^{6} + {b}^{6} + {a}^{6} - {b}^{6} = 2 {a}^{6} \ {a}^{6} + {a}^{6} = 2 {a}^{6} \ 2 {a}^{6} = 2 {a}^{6}$