问题
解答题
计算:
(1)(a-2)(a+2)(a2+4)
(2)(2m3n2+3m2n2-mn3+4mn)÷(-6mn)
答案
(1)原式=(a2-4)(a2+4)=a4-16;
(2)原式=-
m2n-1 3
mn+1 2
n2-1 6
.2 3
计算:
(1)(a-2)(a+2)(a2+4)
(2)(2m3n2+3m2n2-mn3+4mn)÷(-6mn)
(1)原式=(a2-4)(a2+4)=a4-16;
(2)原式=-
m2n-1 3
mn+1 2
n2-1 6
.2 3