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mananakavlelash
@mananakavlelash
July 2022
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преобразовать 4х^ 2 -(5у-1)^ 2 +20у^ 2 +7у=
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burackowamasha
4x-25y^2+10y-1+20y^2+7y=4x-5y^2+17y-1
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gazievakamila
4х²-(5у-1)²+20у²+7у=4х²-(25у²-10у+1)+20у²+7у=4х²-25у²+10у-1+20у²+7у=
=4х²-5у²+17у-1
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=4х²-5у²+17у-1