SOLUTION: i do not understand f (x)= x^22 + 6x +9 o, -3 I need to know the steps to get the result

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: i do not understand f (x)= x^22 + 6x +9 o, -3 I need to know the steps to get the result      Log On


   

Question 397563: i do not understand
f (x)= x^22 + 6x +9
o, -3

I need to know the steps to get the result
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!


Hi, 

f (x)= x^2 + 6x +9

factored

f (x)= (x+3)(x+3)

|setting f(x) = 0 to find the root(s) of the equation

 0 = (x+3)(x+3)     |note factors are indentical is this example

       (x+3)= 0  

         x = -3   

PT(-3,0) is the x-intercept and the vertex of the parabola as well in this ex