Question

if x= 3 + √8 then x^3 + 1 by x^3 +√8 =​

Answer 1

Answer:

Given that..

x=3+8–√…(1)

⇒1x=3−8√(3)2−(8√)2

⇒1x=3−8–√….(2)

Now adding (1) & (2) we get…

x+1x=(3+8–√)+(3−8–√)

⇒x+1x=6

Now,

x2+1x2

=(x+1x)2–2.x1x

=62–2

=36–2

=34 . (Ans).

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