Question

If x²+4x-1=0 and x is positive then find the value of x²+1/x² Step by step explaination ​

Answer 1

Answer:

x²+4x-1=0

so, x² = 1-4x

and 1/x² = 1/1-4x

therefore, x²+1/x²= 1-4x + 1/1-4x

                           = (1-4x)²+1 /1-4x

                          = 1+16x²-8x+1/1-4x

                          = 16x²-8x+2 /1-4x

Step-by-step explanation: