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masha21090
@masha21090
July 2022
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Упростите выражение
(а + 7) (а - 1) + (а - 3)2; в) 3 (у + 5)2 - 3у2
Решите мне у меня завтра контрольная плизззз:)
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Lana725875
Verified answer
(а+7)(а-1)+(а-3)^2=а^+7а-а-7+а^-6а+9=2а^+2=2(а^+1)
3(у+5)^-3у^=3(у^+10у+25)-3у^=3у^+30у+75-3у^=30у+75=5(6у+15)
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Verified answer
(а+7)(а-1)+(а-3)^2=а^+7а-а-7+а^-6а+9=2а^+2=2(а^+1)3(у+5)^-3у^=3(у^+10у+25)-3у^=3у^+30у+75-3у^=30у+75=5(6у+15)