Question

x=2+√5, prove that x^2+1=18x^2

Answer 1

Step-by-step explanation:

x=2+√5

x= 7

then,

x^2+1=18x^2

x^2+1= 50

and, 18x^2= 882

hence, 50 =\= 882

so, x^2+1 =\= 18x^2

Answer 2

Answer:

I'm afraid my answer doesn't match to the answer given, i.e. I'm unable to prove it.

But I've attached my solution. You can check it.

Adiós! Hope this helps you.