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kurlenkova2016
@kurlenkova2016
August 2022
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выполни умножение
а) (a+1)*(a+1)
в) (2+y)*(y+3)
д) (1+x)*(1-x)
ж) (x-y)*(x+y)
и)(2a+b)*(a+2b)
б) (x+1)*(x+2)
г) (a+b)*(a+b)
e) (a-2)*(3-a)
з)(a-b)*(a+b)
к) ( 3x+2y)*(3x+2y)
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Answers & Comments
vladgushchin9
А) (а+1)(а+1)=(а+1)²=а²+1+2а
в) (2+y)*(y+3)=2у+6+у²+3у=у²+5у+6
д) (1+x)*(1-x)=1-х²
ж) (x-y)*(x+y)=х²-у²
и)(2a+b)*(a+2b)=2а²+4аб+аб+2б²=2а²+5аб+2б²
б) (x+1)*(x+2) =х²+2х+х+2=х²+3х+2
г) (a+b)*(a+b) =(а+б)²=а²+б²+2аб
e) (a-2)*(3-a)=3а-а²-6+2а=-а²+5а-6
з)(a-b)*(a+b) =а²-б²
к) ( 3x+2y)*(3x+2y)=(3х+2у)
²=9х²+4у²+12ху
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Answers & Comments
в) (2+y)*(y+3)=2у+6+у²+3у=у²+5у+6
д) (1+x)*(1-x)=1-х²
ж) (x-y)*(x+y)=х²-у²
и)(2a+b)*(a+2b)=2а²+4аб+аб+2б²=2а²+5аб+2б²
б) (x+1)*(x+2) =х²+2х+х+2=х²+3х+2
г) (a+b)*(a+b) =(а+б)²=а²+б²+2аб
e) (a-2)*(3-a)=3а-а²-6+2а=-а²+5а-6
з)(a-b)*(a+b) =а²-б²
к) ( 3x+2y)*(3x+2y)=(3х+2у)²=9х²+4у²+12ху