Question

X=✓5+2 then x power 2+1 by xpower 2

Answer 1

Step-by-step explanation:

x= √5+2

1/x=1/(√5+2)

=(√5-2)/(√5&2)(√5+2)

=(√5-2)/5-4

=√5-2

x+1/x=2√5

x^2+1/x^2

=(x+1/x)^2-2.x.1/x

=(2√5)^2-2

=20-2

=18