Science

Math

Humanities

... and beyond

Socratic Meta
Featured Answers

Topics

How do you evaluate $x^2+2x-1$ when $x=2$ ?

1 Answer

Oct 27, 2014

All you need to do is replace $x$ with $2$ since it has been given $x=2$ .

So,
$x^2-2x-1 = (2)^2+2(2)-1 = 4+4-1 = 7$

Related questions

See all questions in Expressions with One or More Variables

Impact of this question

7806 views around the world

You can reuse this answer
Creative Commons License