Question

(a_b)(a+b)(a2+b2)(a4+b4)=

Answer 1

$(x - y)(x + y)( {x}^{2} + {y}^{2} )( {x}^{4} + {y}^{4} ) \\ = ( {x}^{2} - {y}^{2} )( {x}^{2} + {y}^{2} )( {x}^{4} + {y}^{4} ) \\ = ( {x}^{4} - {y}^{4} )( {x}^{4} + {y}^{4} ) \\ = {x}^{8} - {y}^{8}$