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arturgrigoryan2
@arturgrigoryan2
March 2022
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1. Упростите выражение: a) -За +7а -10а б) 3x-5-2x+ 7 2. Раскройте скобки и упростите: a) n +(-8m+ 2n) б) -4y-3(-5x +2y) в) -(a -6b) (-8x+ y) г) 4(а -9) -2(13-За) (11-а)
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vfcz222
1) -3а+7а-10а=-6а
3х-5-2х+7=х+2
2) n+(-8m+2n)=n-8m+2n=3n-8m
-4y-3(-5x+2y)=-4y+15x-6y=-10y+15x
-(a-6b)(-8x+y)=-(-8ax+ay+48bx-6by)=8ax-ay-48bx+6by
4(a-9)-2(13-3a)(11-a)= 4a-36a-(26-6a)(11-a)=4a-36a-(286-26a-66a+6a^2)=4a-36a-286+92a-6a^2=60a-286-6a^2
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Answers & Comments
3х-5-2х+7=х+2
2) n+(-8m+2n)=n-8m+2n=3n-8m
-4y-3(-5x+2y)=-4y+15x-6y=-10y+15x
-(a-6b)(-8x+y)=-(-8ax+ay+48bx-6by)=8ax-ay-48bx+6by
4(a-9)-2(13-3a)(11-a)= 4a-36a-(26-6a)(11-a)=4a-36a-(286-26a-66a+6a^2)=4a-36a-286+92a-6a^2=60a-286-6a^2