题目内容
计算
(5a2b3)(-6a5b2c)
-30a7b5c
下列计算正确的是
A.(a3)2·a5=a10
B.(-2ab3)2·(-3a4)=6a5b6
C.(-5a2b3)·(-2a)=10a3b3
D.(-5a2b3)(-3a)2=45a4b3
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A.(2ab-a2-b2)-(a2-b2+2ab)=0
B.(2x2+3x-1)-4(x-x2+1)=-2x2-x+3
C.m-〔2n-(3p+1)〕=m-2n-3p-1
D.8a3b2+(-6a3b2)+5a2b3+(-7a3b2)=-5a3b2+5a2b3