Check my precalc?
posted by Rebekah .
#1: f(x) = x^24x
find vrtex, axis ofsym, yint, xint if any, domain, range, where increasing and decreasing.
I got.... vertex: 2,4
axis of sym: x=2
D= (infinity, infnity)
range= [4,infinity)
im stuck of the intercepts because when i plug i 0 for x i get yint of 0 but the graph doesnt show that.
Am i doing the completingthe square wrong
I got (x^22)^2 + 4
#2 Same requirements as the first question
f(x)= x^2 + 6x +9
I got... vertex: (3,18)
axis of sym: x=3
Domain= (infinity, infinity)
Range= [18, infinity)
yint (0,9)
xint idk???
After completing the square I got:
(x+3)^2 + 18
Also a question, how do you know if there is an x or y int without drawing the graph because my graph des not show a xint but the equation does?
Thanks!
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