计算:3y(y-4)(2y+1)-(2y-3)(4y눀+6y-9)

2025-04-27 22:21:33
推荐回答(2个)
回答1:

解:
3y(y-4)(2y+1)-(2y-3)(4y²+6y-9)
=3y(2y²-7y-4)-(8y³+12y²-18y-12y²-18y+27)
=6y³-21y²-12y-8y³+36y-27
=-2y³-21y²+24y-27
希望对你有帮助,望采纳,谢谢~

回答2:

=(3y^2-12y)(2y+1)-(8y^3+12y^2-18y-12y^2-18y+27)
=6y^3+3y^2-24y^2-12y-8y^3+36y-27
=-2y^3-21y^2+24y-27