Question

Help please

State the x and y-intercepts for each function.

f(x)= -x^3+4x

Answer 1

y-intercept is where x=0: f(0) = 0

x-intercept is where y=0
y = x(4-x^2)
= x(2-x)(2+x)
So, the x-intercepts are at -2,0,+2

Answer 2

thanks for the help