|x+2|+(y+3)²=0可以得出
X=-2,Y=-3
5x²-3y²-(x²-y²)-(3x²+4y²)=-50把它化简5x²-3y²-(x²-y²)-(3x²+4y²)要过程5x²-3y²-(x²-y²)-(3x²+4y²)=5x²-3y²-x²+y²-3x²-y²=x²-6y²=4-54=-50
5x²-3y²-(x²-y²)-(3x²+4y²)其中|x+2|+(y+3)²=0
5x²-3y²-(x²-y²)-(3x²+4y²)其中|x+2|+(y+3)²=0
数学人气:957 ℃时间:2020-01-28 19:38:20
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