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v457fox
@v457fox
November 2021
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(х-3у)²-(2х+у)(2у-х) помогите решить
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ВикаВикторовна
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= x²-6xy+9y²-(4xy-2x²+2y²-xy) = x²-6xy+9y²-3xy+2x²-2y² = 3x²-9xy+7y²
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Verified answer
= x²-6xy+9y²-(4xy-2x²+2y²-xy) = x²-6xy+9y²-3xy+2x²-2y² = 3x²-9xy+7y²