已知A=x³+2x²y+2y²-1,B=3+y³-2x²+2x³若A+B+C=0,求C
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![已知A=x³+2x²y+2y²-1,B=3+y³-2x²+2x³若A+B+C=0,求C](/uploads/image/z/1758311-71-1.jpg?t=%E5%B7%B2%E7%9F%A5A%3Dx%26%23179%3B%2B2x%26%23178%3By%2B2y%26%23178%3B-1%2CB%3D3%2By%26%23179%3B-2x%26%23178%3B%2B2x%26%23179%3B%E8%8B%A5A%2BB%2BC%3D0%2C%E6%B1%82C)
已知A=x³+2x²y+2y²-1,B=3+y³-2x²+2x³若A+B+C=0,求C
已知A=x³+2x²y+2y²-1,B=3+y³-2x²+2x³
若A+B+C=0,求C
已知A=x³+2x²y+2y²-1,B=3+y³-2x²+2x³若A+B+C=0,求C
C = -(A+B)
=-A-B
=-(x³+2x²y+2y²-1)-(3+y³-2x²+2x³)
=-3x³-2x²y-y³+2x²-2y²-2
C=-3x³-2x²y+2x²-y³-2y²-2
这问题很简单的,好好做
c=-3x(3)-2x(2)y-2y(2)-y(3)-2