Question

if x2-3x-1=0 then find value of x2+1/x2​

Answer 1

Answer:

I hope that this answer will help you

Answer 2

Answer:

The value of x2+1/x2​=7.

Step-by-step explanation:

Given: $x^{2} -3x+1=0$.

To find the value of $x^{2} +\frac{1}{x^{2} }$.

$x^{2} -3x+1=0$

$\frac{x^{2} -3x+1}{x} =0$      [Dividing both sides by x]

$x-3+\frac{1}{x}=0$

$x+\frac{1}{x}=3$     .....(1)

Now squaring both sides in equation (1) we get:

$x^{2} +\frac{1}{x^{2} } +2=9$

$x^{2} +\frac{1}{x^{2} }=7$

Hence, if x2-3x-1=0 then find value of x2+1/x2​=7.

#SPJ3