Pre-Algebra

n(n-1)-4

How do I solve stuff like this?

  1. 👍 0
  2. 👎 0
  3. 👁 86
asked by Jess
  1. How would I also solve the following?

    f(x)=x^2-4+3 what is the output of f(-3)?

    1. 👍 0
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    posted by Jess
  2. Just use the distributive property:

    n(n-1)-4
    n*n - n*1 - 4
    n^2-n-4

    Since f(x) = x^2-4x+3, and you want f(-3), just replace all the x's with -3 and you have

    f(-3) = (-3)^2 - 4(-3) + 3
    = 9+12+3
    = 24

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    posted by Steve

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