把x寫作equation y=ax^2+bx+c 的subject
回答 (3)
2008-06-06 5:18 pm
✔ 最佳答案
Completing the square, also called perfect square.Shown as follow:
y=ax^2+bx+c
y=a(x^2 + b/a x + c/a)
y=a[(x+b/2a)^2 - (b/2a)^2 +c/a]
Thus,
x=square root of [(y-c)/a+(b/2a)^2] - b/2a
2008-06-07 12:42 am
y=ax^2+bx+c [ x ]
y-c=x(ax+b)
x = (y-c)/(ax+b)
y-c=x(ax+b)
x = (y-c)/(ax+b)
2008-06-06 8:10 am
參考: me
收錄日期: 2021-04-15 15:20:31
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