February 23, 2017

Homework Help: Precalculus

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

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