Question

ifx-1/x2=7 find the value of — x2+1/x2 find answers and give it to me​

Answer 1

Answer: The answer is  51 .

Step-by-step explanation:  

    $x- 1/x= 7$

⇒$(x-1/x)^{2} = 7^{2}$

⇒$(x+1/x)^{2} -4 =49$

⇒$(x+1/x)^{2} = 49+4$

⇒$(x+1/x)^{2}$ = $53$

now, $x^{2} +1/x^{2} =(x+1/x)^{2} -2$

     ⇒$x^{2} +1/x^{2} =53-2 =51$

   ∴ the answer is  51 .