A quadratic function is given.

Algebra
Tutor: None Selected Time limit: 1 Day

f(x) = x2 + 6x + 8

f(x) =

(b) Find its vertex and its x- and y-intercept(s). (If an answer does not exist, enter DNE.) 
vertex    (xy) =
  
x-intercepts    (xy) =
  
 (smaller x-value)
(xy) =
  
 (larger x-value)
y-intercept    (xy) =
  


Mar 22nd, 2015

 x^2 + 6x + 8 = (x+3)^2 - 1 = (x+2)(x+4)

vertex (-3; -1)

x-intercepts: (-4; 0) - smaller x-value

                     and (-2; 0) - larger x-value

y-intercept: (0; 8).


Mar 22nd, 2015

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