Ответ:
(√5x-√5y)(√5x-√5y)-5(x+y)=(√5x-√5y)²-5x-5y=5x-10√xy+5y-5x-5y=10√xy
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Ответ:
(√5x-√5y)(√5x-√5y)-5(x+y)=(√5x-√5y)²-5x-5y=5x-10√xy+5y-5x-5y=10√xy