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typasertyu
@typasertyu
July 2022
2
4
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Раскройте скобки и приведите подобные слагаемые:
-3(х-у)+4(2х+у)
2(а-3(а-5))-7а
4(3х-9у)-7(х-а)+8(2а-х)
-(а-в-с)-(в-с-а)+2(а+в+с)
Даю 34 балла.
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32ійвв
1).=3x+3y+8x+4y
2a-6+3a-5-7a
1 votes
Thanks 1
Flash3146
-3(x-y)+4(2x+y)=-3x+3y+8x+4y=5x+7y
2(a-3(a-5))-7a=2(a-3a+15)-7a=2a-6a+30-7a=-11a+30
4(3x-9y)-7(x-a)+8(2a-x)=12x-36y-7x+7a+16a-8x=-3x-13a
-(a-b-c)-(b-c-a)+2(a+b+c)=-a+b+c-b+c+a+2a+2b+2c=2c+2c+2a+2b=4c+2a+2b
2 votes
Thanks 2
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Answers & Comments
2a-6+3a-5-7a
2(a-3(a-5))-7a=2(a-3a+15)-7a=2a-6a+30-7a=-11a+30
4(3x-9y)-7(x-a)+8(2a-x)=12x-36y-7x+7a+16a-8x=-3x-13a
-(a-b-c)-(b-c-a)+2(a+b+c)=-a+b+c-b+c+a+2a+2b+2c=2c+2c+2a+2b=4c+2a+2b