plz solve
Asked by | 11th May, 2008, 09:13: AM
Expert Answer:
x²-4x-5=0
x²-5x+x-5=0
x(x-5)+1(x-5)=0
(x-5)(x+1)=0
x = 5,-1 therefore α = 5 and β = -1
and α3 = 53 and β3 = (-1)3
α3 = 25 and β3 = -1
α³ + β³ = 25-1 = 24
Answered by | 13th May, 2008, 01:09: AM
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