Question

56.
Given that is a root of the equatioon x^2- X - 3 = 0. Evluate
a^3+1/a^5-a^4-a^3+a^2
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Answer 1

Answer:

x2 -x-3=0

a3+1/a4-a3+a2

(a)3+1(a)4 -(a)3+(a)2

4a-4a-5a

a=5