SOLUTION: please help to solve this one I now have grey hair given f(x)=5x to the 2nd-3x+1, find f(-2). thank you

Algebra ->  Systems-of-equations -> SOLUTION: please help to solve this one I now have grey hair given f(x)=5x to the 2nd-3x+1, find f(-2). thank you       Log On


   

Question 93712: please help to solve this one I now have grey hair
given f(x)=5x to the 2nd-3x+1, find f(-2). thank you
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Sorry 'bout your grey hair!
f%28x%29+=+5x%5E2-3x%2B1 find f%28-2%29 You just replace x with -2
f%28-2%29+=+5%28-2%29%5E2-3%28-2%29%2B1
f%28-2%29+=+5%284%29-%28-6%29%2B1
f%28-2%29+=+20%2B6%2B1
f%28-2%29+=+27