Given that a and b are the roots of the equation2x^2-4x-5=0,where a>b.Find the value of each of the following expressions without solving the equation.
(Leave the radical sign '開方' in the answer if necessary.)
a.(b over 1-a)(a over 1-b)
b.a-b
c.a-2b over a +b-2a over b
Maths Problem (Fast)
2010-09-19 5:18 am
回答 (1)
2010-09-19 6:38 am
收錄日期: 2021-04-23 20:43:57
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