根x²+(y+5)号 * 根x²+(y-5)²号=32y²/9-x²/16=1
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![根x²+(y+5)号 * 根x²+(y-5)²号=32y²/9-x²/16=1](/uploads/image/z/13136605-61-5.jpg?t=%E6%A0%B9x%26%23178%3B%2B%EF%BC%88y%2B5%EF%BC%89%E5%8F%B7+%2A+%E6%A0%B9x%26%23178%3B%2B%EF%BC%88y-5%EF%BC%89%26%23178%3B%E5%8F%B7%3D32y%26%23178%3B%2F9-x%26%23178%3B%2F16%3D1)
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根x²+(y+5)号 * 根x²+(y-5)²号=32y²/9-x²/16=1
根x²+(y+5)号 * 根x²+(y-5)²号=32
y²/9-x²/16=1
根x²+(y+5)号 * 根x²+(y-5)²号=32y²/9-x²/16=1
把2式代入1式中消去X^2
求什么东东?
求 x y ?