SOLUTION: evaluate the function f(x)=x2+9x+6 at the given value of the independent variable and simplify a. f(-7) b. f(x+8) c. f(-x) I know the a. answe

Algebra ->  Graphs -> SOLUTION: evaluate the function f(x)=x2+9x+6 at the given value of the independent variable and simplify a. f(-7) b. f(x+8) c. f(-x) I know the a. answe      Log On


   

Question 395054: evaluate the function f(x)=x2+9x+6 at the given value of the independent variable and simplify

a. f(-7) b. f(x+8) c. f(-x)

I know the a. answer is -8 but I need to know how they came up with that answer
f(-7)= -8
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
Just replace each value into x:

a: (-7)^2 + 9(-7) + 6
b: (x+8)^2 + 9(x+8) + 6
c: (-x)^2 + 9(-x) + 6

After that you should be able to simplify the expressions.