方程x²/9-y²/16=1怎么解出y=+-4/3√x²-9 算了好几次都不对,
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![方程x²/9-y²/16=1怎么解出y=+-4/3√x²-9 算了好几次都不对,](/uploads/image/z/579147-51-7.jpg?t=%E6%96%B9%E7%A8%8Bx%26%23178%3B%2F9-y%26%23178%3B%2F16%3D1%E6%80%8E%E4%B9%88%E8%A7%A3%E5%87%BAy%3D%2B-4%2F3%E2%88%9Ax%26%23178%3B-9+%E7%AE%97%E4%BA%86%E5%A5%BD%E5%87%A0%E6%AC%A1%E9%83%BD%E4%B8%8D%E5%AF%B9%2C)
方程x²/9-y²/16=1怎么解出y=+-4/3√x²-9 算了好几次都不对,
方程x²/9-y²/16=1怎么解出y=+-4/3√x²-9
算了好几次都不对,
方程x²/9-y²/16=1怎么解出y=+-4/3√x²-9 算了好几次都不对,
x²/9-y²/16=1
x²/9-1=y²/16
x²/9-1=(y/4)²
y/4=±1/3√x²-9
y=±4/3√x²-9
9y²+144-16x²=0 b=0,a=9,c=144-16x²
Δ=6²(16x²-144)
y=(+-6根号下16x²-144)/18
y=(+-24根号下x²-9)/18
y=+-4/3√x²-9