Question

2x - 1/x = 4 then x^2 + 1/4x^2 = ?

don't take it as simple
it is very hard
I tried many times
but I couldn't solve this

solve this with the help of algebraic formulae
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Answer 1

Answer:

5

Step-by-step explanation:

given in photo

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Answer 2

2x - 1/x = 4

squaring both the sides

4x² + 1/x² = 20

Dividing both sides with 4

x² + 1/4x² = 5