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

  1. #1
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    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?
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  2. #2
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    Quote Originally Posted by superduper1 View Post
    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) = ....
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  3. #3
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    2f(a) = 4a^2 - 2a + 8 ?
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  4. #4
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    Quote Originally Posted by superduper1 View Post
    2f(a) = 4a^2 - 2a + 8 ?
    yes, just multiply f(a) by 2.
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