quadratic equation: y=ax2 + bx + c, how to find x?
If y, a, b and c are known, How do I find x? Urgent, please!!!!
Thank you very much.
回答 (2)
✔ 最佳答案
y=ax2 + bx + c
y-c=2ax+bx
y-c=x(2a+b)
x=(y-3)/(2a+b)
參考: MATHS BOOK
□□-b±√[(b^2)-4a(c-y)]
x=--------------------------
□□□□2a
參考: ???
收錄日期: 2021-04-25 12:44:28
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