Question

Please answer questions 3 and 4.
Please answer fast.
The question is as follows.

Answer 1

Answer:

it is very easy

Step-by-step explanation:

q-3

ans-----

x=3+2root2

sp1/x=1/(3+2root2)

now x+1/x whole square=xsquare +1/xsquare +2

(3+2root2)whole square/3+2root2

17+12root2/3+2root2-2=xsquare+1/xsquare

{17+12root2(3-2root2)}-2[by rationalising denominator]

{51-34root2+36root2-48}-2

3+2root 2-2

1+2$\sqrt{2}$=$x^{2}$+$1/x^{2}$

similarly u can prove the second question too

read answer throughly and post doubt related to it

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