# Math Help - Find 2f(a) in the function f(x)

1. ## Find 2f(a) in the function f(x)

If f(x) = 2x^2-x +4
Find 2f(a)

How do I deal with the 2 in front of the f(a) ?
Typically I just plug 'a' into the values of x and compute. But how do I deal with the 2?

2. Originally Posted by superduper1
If f(x) = 2x^2-x +4
Find 2f(a)

How do I deal with the 2 in front of the f(a) ?
Typically I just plug 'a' into the values of x and compute. But how do I deal with the 2?
$2 f(a) = 2(2a^2-a +4) = ....$

3. 2f(a) = 4a^2 - 2a + 8 ?

4. Originally Posted by superduper1
2f(a) = 4a^2 - 2a + 8 ?
yes, just multiply f(a) by 2.