Question

if 2x+1/x=5 find the value of 4x²+1/x²​

Answer 1

Answer:

The required value is 21

Answer 2

Answer:

21

Step-by-step explanation:

Given => 2x + ( 1/5 ) = 5

on Squaring Both Sides ,

We Get :-

4x^2 + 1/x^2 + 4 x/ 4 = 25

As , ( A+ B )^2 = A^2 + B^2 + 2AB )

So , Required Ans. / 4x^2 + 1/x^2 = 25 - 4 = 21