Quadratic lnequalities
(1) Solve x^2 - 8x + 12 > 0 by algebraic method
(2) Solve 8 - 2x - x^2 >_ 0 by graphical method
(3) Solve x -5 > 0 or 2x < x+3.
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F5 Maths
2013-05-28 8:29 am
回答 (1)
2013-05-28 6:24 pm
✔ 最佳答案
(1) x^2 - 8x + 12 = (x - 2)(x - 6) > 0so x < 2 or x > 6.
(2) Need to know what graph has been provided.
(3)
x - 5 > 0 so x > 5
2x < x + 3
so x < 3
For x - 5 > 0 or 2x < x + 3
x < 3 or x > 5.
收錄日期: 2021-04-25 22:39:44
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