1. 5(2х-3)+2(7-3х) 2 2.6у(у -3у)-3у(у-6у) 3.(3а-1)(2а+5)-6а - вопрос №15232732263363312569394875 от fdimon 24.09.2021 05:57

Question

Алгебра: 1. 5(2х-3)+2(7-3х) 2 2.6у(у -3у)-3у(у-6у) 3.(3а-1)(2а+5)-6а

fdimon · Answer

1. = 10х-15+14-6х=4х-12.= 6у (-2у)--3у (-5у)=-6у×2у+3у×5у=(-6×2+3×5) у×у= (-12+15) у×у=3у×у=3у^23.=6а^2+15а-2а-5-6а=6а^2+7а-54.=12b-(12bd-8b-3d+2)=12b-12bd+8b+3d-2=20b-12bd+3d-2...