5的根号x³y-y根号4xy-6根号xy+x根号y/x-根号x/y
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5的根号x³y-y根号4xy-6根号xy+x根号y/x-根号x/y
5的根号x³y-y根号4xy-6根号xy+x根号y/x-根号x/y
5的根号x³y-y根号4xy-6根号xy+x根号y/x-根号x/y
5的根号x³y-y根号4xy-6根号xy+x根号y/x-根号x/y
=5x√xy-2√xy-6√xy+√xy-1/y·√xy
=(5x-2-6+1-1/y)√xy
=(5x-7-1/y)√xy
=(5xy-7y-1)/y·√xy
答:
显然,x和y同号,并且都不为0
5的根号x³y-y根号4xy-6根号xy+x根号y/x-根号x/y
=5√(x³y)-y√(4xy)-6√(xy)+x√(y/x)-√(x/y)
=5|x|√(xy)-2y√(xy)-6√(xy)+x√(xy) / |x| -√(xy) /|y|
=(5|x|-2y-6+x/|x|-1/|y|) *√(xy)