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azeriboss
@azeriboss
July 2022
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Раскройте к скобки и упростите выражение: 1) 3(a-b)-2(a+b); 2) 4(x+y)+5(2x-y); 3) 2,4(c-3b)-1,3(2c-d).
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Answers & Comments
lollil86
1.=3a-3b-2a-2b=a-5b
2.=4x+4y+10x-5y=14x-y
3.=2,4c-7,2b-2,6c+1,3d=-0,2c-7,2b+1,3d
0 votes
Thanks 1
tataresku
1) 3(a-b)-2(a+b)= 3a-3b-2a-2b=1a+5b ,
2) 4(x+y)+5(2x-y)=4x+4y +10x-5y=14x-1y
3) 2,4(c-3b)-1,3(2c-d)= 2.4c - 7.2b- 2.6c - 1.3d= (-0.2)c-7.2b- 1.3 d
1 votes
Thanks 2
lollil86
не правильно 1 решил(а) там когда скобку ра скрываешь знаки менять надо)
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Answers & Comments
2.=4x+4y+10x-5y=14x-y
3.=2,4c-7,2b-2,6c+1,3d=-0,2c-7,2b+1,3d
3) 2,4(c-3b)-1,3(2c-d)= 2.4c - 7.2b- 2.6c - 1.3d= (-0.2)c-7.2b- 1.3 d