SOLUTION: At what value(s) of x does the function f(x)= x^2-9 cross the x axis? A- 0 B- 3 C- -3 D. -3 and 3

Question 1088753: At what value(s) of x does the function f(x)= x^2-9 cross the x axis?
A- 0
B- 3
C- -3
D. -3 and 3
Found 2 solutions by Boreal, Fombitz:
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
It crosses the x-axis when y=0
x^2-9=0
x= 3 and -3
D.
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

Solve for x.

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