Posted by **Steve** on Tuesday, February 11, 2014 at 5:38pm.

Given: f(x) = X^2-x

evaluate: f(sqrt2 + 3)

I have worked out this and am stuck:

(sqrt2+3)^2 - (sqrt2+3)

(sqrt2+3)*(sqrt2+3)- (sqrt2 +3)

(sqrt2)^2+ 3sqrt2 +3sqrt2+ 9- (sqrt2+3)

2+6sqrt2 +9-sqrt2-3

and am stuck or wrong here. Ans= SQRT2+6sqrt2 all under radical