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secondary 4 | A Maths
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I have never come across question asking for alpha minus beta,, can anyone help me with this question, thank you!!!
Date Posted: 4 years ago
Views: 267
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Here
Date Posted:
4 years ago
OHHHH didnt think of solving it this way! Thank you so much for your help!! :))
Alternative way is to use the quadratic formula.
x = (-(-4) ± √((-4)² - 4(1)(2)) ) / 2(1)
x = ½ ± ½√8
one root is ½ + ½√8, the other ½ - ½√8
Since α < β, then the difference is negative
= ½ - ½√8 - (½ + ½√8)
= - √8
(This also tells you that α = ½ - ½√8, β = ½ + ½√8)
x = (-(-4) ± √((-4)² - 4(1)(2)) ) / 2(1)
x = ½ ± ½√8
one root is ½ + ½√8, the other ½ - ½√8
Since α < β, then the difference is negative
= ½ - ½√8 - (½ + ½√8)
= - √8
(This also tells you that α = ½ - ½√8, β = ½ + ½√8)
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