5(3a^2b-ab^2)-(ab^2+3a^2b)怎么化简

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5(3a^2b-ab^2)-(ab^2+3a^2b)怎么化简

5(3a^2b-ab^2)-(ab^2+3a^2b)怎么化简
5(3a^2b-ab^2)-(ab^2+3a^2b)怎么化简

5(3a^2b-ab^2)-(ab^2+3a^2b)怎么化简
5(3a^2b-ab^2)-(ab^2+3a^2b)
=15a^2b-5ab^2-ab^2-3a^2b
=(15-3)a^2b-(5+1)ab^2
=12a^2b-6ab^2.

=6ab*(2a-b)

把括号去掉.
原式=15a^2b-5ab^2-ab^2-3a^2b
=12a^2b-6ab^2

5(3a^2b-ab^2)-(ab^2+3a^2b)
=15a^2b-5ab^2-ab^2-3a^2b
=(15-3)a^2b-(5+1)ab^2
=12a^2b-6ab^2
=6(2a^2b-ab^2)