Asked by Hannah

Find the x and y intercepts of the following function.

f(x) = 9x - x^3

Answers

Answered by TutorCat
x-intercept: set y or f(x)=0 and solve for x

y-intercept: set x = 0 and solve for y
Answered by Bosnian
y-intercept
f(0)=9*0-0^3=0-0=0

x-intercept
9x-x^3=x*(9-x^2)=0
First solution is x=0
Next solution
9-x^2=0
x^2=9
x=+/- sqroot(9)=+/-3

You have 3 solutions
x1=0
X2=-3
x3=3
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