求做2道计算题 3y(-2xy)^2(-3xy^2)^3除以xy^3 (a-1)(a+1)(a^2-1)
2个回答
(1)原式=-3y*4x^2y^2*27x^3y66 除以xy^3
=-324x^5y^9除以xy^3
=-324x^4y^6
(2)原式=(a^2-1)^2
= a^4-2a^2+1
貌似是这个数、
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