Question

if x=5-2root3 find the value of x2+1/x2​

Answer 1

Step-by-step explanation:

x=5-2√3.

x²=(5-2√3)2. 1/x²=-x²

=5²-2.2√3+(2√3)2

=25-4√3+12

right side:x²+1/x²

25-4√3+12-25+4√3-12

=0