SOLUTION: f(x)=3x^2+3x-4, find f(-5) Could you help me solve this function i am having troubles

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Question 783596: f(x)=3x^2+3x-4, find f(-5)
Could you help me solve this function i am having troubles
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=3x%5E2%2B3x-4

f%28-5%29=3%28-5%29%5E2%2B3%28-5%29-4 Replace ALL copies of x with -5, then evaluate

f%28-5%29=3%2825%29%2B3%28-5%29-4

f%28-5%29=75-15-4

f%28-5%29=60-4

f%28-5%29=56