因式分解(x2次方+y2次)2次方-4x2次方y2次方

问题描述:

因式分解(x2次方+y2次)2次方-4x2次方y2次方
求解QAQ

( x" + y" )" - 4x"y"= ( x" + y" )" - ( 2xy )"= ( x" - 2xy + y" )( x" + 2xy + y" )= ( x - y )"( x + y )"或者= x^4 + 2x"y" + y^4 - 4x"y"= x^4 - 2x"y" + y^4= ( x" - y" )"= ( x - y )"( x + y )"