已知:M+N=2x立方+2x눀-x-2,M-P=3x立方-2+x-4x눀 1)求N+P 2)当X=

-2是,求N+P的值
2024-11-23 11:05:53
推荐回答(1个)
回答1:

解:1)N+P=M+N-(M-P)念物镇=2x^3+2x²-x-2-(3x^3-2+x-4x²)蚂陪=-x^3+6x^2-2x
2)当仔粗x=-2,N+P=-x^3+6x^2-2x=36