Question

plz tell the ans hope u know help me out.......................​

Answer 1

Step-by-step explanation:

x-1/x=1/2

squaring on both sides

x²+1/x²-2=1/4

x²+1/x²=1/4+2

x²+1/x²= 9/4

4 is multiplied both side

4x²+4/x²=4(9/4)

4x²+4/x²= 9

Answer 2

Given: (x - 1/x) = 1/2.........equation 1

and x x 1/x = 1...........equation2

Now, 4x² + 4/x²

= 4[ x² + 1/x²]

{we will use this formula : a² + b² = (a-b)² +2 ab}

Now, 4[{x -1/x }² + 2x x 1/x]

putting value from equation 1 and 2

= 4[ (1/2)² +2(1)]

=4[(1/4)+2]

=4[9/4]

= 9

I hope it will help u

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