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[83]
3 years ago
10
If α and β are the zeroes of a quadratic polynomial x²+x-2 then find the value of (α/β+2) (β/α+2)
Mathematics
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Korvikt
[17]
3 years ago
3
0
Βα = -2 and α+β= -1
(α/β +2)(β/α+ 2)
= 1 + 4 + 2β/α + 2α/β
= 5 + 2(β/α+α/β)
= 5 + 2 [(α^2+β^2) / αβ]
α^2+β^2 = (α+β)^2 - 2αβ = 1 - 2(-2) = 5
SO THE ANSWER IS 5+2(5/-2) = 5 - 5 = 0
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