-2=x(2-y)²-8=x(-1-y)²
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-2=x(2-y)²-8=x(-1-y)²
-2=x(2-y)²
-8=x(-1-y)²
-2=x(2-y)²-8=x(-1-y)²
相除
(y-2)²/(y+1)²=1/4
y+1=±2(y-2)
所以y=5,y=1
x=-2/(2-y)²
所以
x=-2/9,y=5
x=-2,y=1
512100
-2=x(2-y)²
-8=x(-1-y)²
4(2-y)²=(-1-y)² 即 (4-2y)²=(-1-y)²
(4-2y)=(-1-y)或则(4-2y)=-(-1-y)
解得 y=5 或则 y=1
y=5时,-2=x(2-y)² 即 -2=x(2-5)² 解得x=-2/...
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-2=x(2-y)²
-8=x(-1-y)²
4(2-y)²=(-1-y)² 即 (4-2y)²=(-1-y)²
(4-2y)=(-1-y)或则(4-2y)=-(-1-y)
解得 y=5 或则 y=1
y=5时,-2=x(2-y)² 即 -2=x(2-5)² 解得x=-2/9
y=1时,-2=x(2-y)² 即 -2=x(2-1)² 解得x=-2
收起
x=-2.y=1或x=-2/9.y=5
两式相除
4=(-1-y)²/(2-y)²
4(4-4y+y²)=1+2y+y²