- Determine the following where f(x) = 2x2 - x + 3
a. f(-4)
b. f(0)
c. f(7)
d. f(2y)
$\displaystyle f(x)=2x^2-x+3$
$\displaystyle f(2y)=2(2y)^2-(2y)+3$
$\displaystyle f(2y)=8y^2-2y+3$
It's called Latex (pronounced Lay-tek), and you can go here and look at the first post for a tutorial.
You can also click on the equation or whatever in the post and you can see the code used to form it.