SOLUTION: For f(x) =-x^2-x+5 , find f(-3)

Algebra ->  Algebra  -> Polynomials-and-rational-expressions -> SOLUTION: For f(x) =-x^2-x+5 , find f(-3)      Log On

Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!
Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!

   

Question 333697: For f(x) =-x^2-x+5 , find f(-3)
Answer by jim_thompson5910(28550) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=-x%5E2-x%2B5 Start with the given equation.


f%28-3%29=-%28-3%29%5E2--3%2B5 Plug in x=-3.


f%28-3%29=-%28-3%29%5E2%2B3%2B5 Rewrite -%28-3%29%5E2--3 as -%28-3%29%5E2%2B3.


f%28-3%29=-9%2B3%2B5 Square -3 to get 9.


f%28-3%29=-1 Combine like terms.