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(1)3f+2f-7f(2)x-f+5x-4f(3)2a+3b+6a+9b-8a+12b(4)3pq+7pq+4pq+pq(5)30a^2b+2b^2c-15a^2b-4...
(1)3f+2f-7f
(2)x-f+5x-4f
(3)2a+3b+6a+9b-8a+12b
(4)3pq+7pq+4pq+pq
(5)30a^2b+2b^2c-15a^2b-4b^2
(6)7xy-8wx+5xy-12xy 展开
(2)x-f+5x-4f
(3)2a+3b+6a+9b-8a+12b
(4)3pq+7pq+4pq+pq
(5)30a^2b+2b^2c-15a^2b-4b^2
(6)7xy-8wx+5xy-12xy 展开
2个回答
展开全部
(1)3f+2f-7f=-2f
(2)x-f+5x-4f=6x-5f
(3)2a+3b+6a+9b-8a+12b=24b
(4)3pq+7pq+4pq+pq=15pq
(5)30a^2b+2b^2c-15a^2b-4b^2=15a^2b+2b^2c
-4b^2
(6)7xy-8wx+5xy-12xy =-8wx
(2)x-f+5x-4f=6x-5f
(3)2a+3b+6a+9b-8a+12b=24b
(4)3pq+7pq+4pq+pq=15pq
(5)30a^2b+2b^2c-15a^2b-4b^2=15a^2b+2b^2c
-4b^2
(6)7xy-8wx+5xy-12xy =-8wx
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展开全部
(1)3f+2f-7f
(3+2-7)f
-2f
(2)x-f+5x-4f
(1+5)x+(-1-4)f
6x-5f
(3)2a+3b+6a+9b-8a+12b
(2+6-8)a+(3+9+12)b
24b
(4)3pq+7pq+4pq+pq
(3+7+4+1)pq
15pq
(5)30a^2b+2b^2c-15a^2b-4b^2
(30-15)a^2b+(2-4)b^2
15a^2b-2b^2
(6)7xy-8wx+5xy-12xy
(7+5-12)xy-8wx
-8wx
(3+2-7)f
-2f
(2)x-f+5x-4f
(1+5)x+(-1-4)f
6x-5f
(3)2a+3b+6a+9b-8a+12b
(2+6-8)a+(3+9+12)b
24b
(4)3pq+7pq+4pq+pq
(3+7+4+1)pq
15pq
(5)30a^2b+2b^2c-15a^2b-4b^2
(30-15)a^2b+(2-4)b^2
15a^2b-2b^2
(6)7xy-8wx+5xy-12xy
(7+5-12)xy-8wx
-8wx
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