Pre-Algebra

n(n-1)-4

How do I solve stuff like this?

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3. 👁 86
1. How would I also solve the following?

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

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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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