SOLUTION: f(x)=5x^-3x+1, find f(-2) 5(-2)^-3(-2)+1 10^+6+1 20+7=27 Just double checking my answers.

Algebra ->  Graphs -> SOLUTION: f(x)=5x^-3x+1, find f(-2) 5(-2)^-3(-2)+1 10^+6+1 20+7=27 Just double checking my answers.      Log On


   

Question 108820: f(x)=5x^-3x+1, find f(-2)


5(-2)^-3(-2)+1
10^+6+1
20+7=27
Just double checking my answers.
Found 2 solutions by Fombitz, MathLover1:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I'm a litle confused here.
Should your function f(x) look like this.
f%28x%29=5x%5E2-3x%2B1
f%28-2%29=5%28-2%29%5E2-3%28-2%29%2B1
f%28-2%29=5%284%29-3%28-2%29%2B1
f%28-2%29=20%2B6%2B1
f%28-2%29=27
Correct answer.
However you went from 10^ in the second line of your solution to 20 in the third line???

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

f%28x%29=5x%5E-3x%2B1, .........I believe your equation is: f%28x%29=5x%5E2+-3x%2B1
find f%28-2%29
f%28-2%29=5%28-2%29%5E2+-3%28-2%29%2B+1
f%28-2%29=5%2A4+%2B+6+%2B+1
f%28-2%29=20+%2B+6+%2B+1
f%28-2%29=27