[(x-3)²+y²]/(x-12)²=1/2如何计算
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[(x-3)²+y²]/(x-12)²=1/2如何计算
[(x-3)²+y²]/(x-12)²=1/2如何计算
[(x-3)²+y²]/(x-12)²=1/2如何计算
由2(x-3)²+2y²=(x-12)²,
2x²-12x+18+2y²=x²-24x+144
x²+12x+36+2y²=126
(x+6)²+2y²=126.