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nikitkafedotov
@nikitkafedotov
August 2022
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УПРОСТИТЕ ВЫРАЖЕНИЕ:
a+b+c-(a-b-c)=
7(2a+5b)-5(3b-4a)=
-2(a-3b)+3(b-2a)=
ПРЕДСТАВЬТЕ В ВИДЕ СУММЫ ВЫРАЖЕНИЕ:
1)15a-9;
2)a-b-c
3)x-3y
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Answers & Comments
polina1361
1. a+b+c - (a-b-c) = a+b+c-a+b+c = 2b + 2c + 0a
2. 7(2a+5b) - 5(3b-4a) = 14a + 35b - 15b + 20a = 34a + 20b
3. -2(a-3b) + 3(b-2a) = -2a + 6b + 3b - 6a = -8a + 9b
1. 15a+9
2. a+b+c
3. x+3y
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Answers & Comments
2. 7(2a+5b) - 5(3b-4a) = 14a + 35b - 15b + 20a = 34a + 20b
3. -2(a-3b) + 3(b-2a) = -2a + 6b + 3b - 6a = -8a + 9b
1. 15a+9
2. a+b+c
3. x+3y