已知x²-6y+y²+8y+25=0 求x三次-y三次
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已知x²-6y+y²+8y+25=0 求x三次-y三次
已知x²-6y+y²+8y+25=0 求x三次-y三次
已知x²-6y+y²+8y+25=0 求x三次-y三次
此题有误,应该将-6y改为-6x.
由x²-6x+y²+8y+25=0,
得 (x-3)²+(y+4)²5=0,
x=3,y=-4,
所以x三次-y三次=93