SOLUTION: Please help me solve this problem: Find f(k-1)when f(x)=5x^2+5x-7.

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Question 886712: Please help me solve this problem: Find f(k-1)when f(x)=5x^2+5x-7.
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!
The idea is this: Everywhere you see an 'x', you replace it with k-1. This is what it means to plug in x = k-1



Start with the given function.

Replace EVERY x with k-1.

** Take special note of the parenthesis on the right side **

Taking advantage of the fact that

FOIL/expand

Distribute

Multiply

Group like terms.

Combine like terms.



It's a lot of work, but hopefully it makes sense.

So the final answer is

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