Question

The x-intercepts of the graph of ƒ(x) = x(x + 1)(x – 5)(x – 7) are: (there is four answers)
1. 0 or 1
2. 1 or -1
3. 5 or -5
4. 7 or -7

Answer 1

x intercept is when y=0 right?

Answer 2

If you have terms multiplied together like:

A * B * C = 0

Only one of the terms has to be zero for the equation to be true.

Answer 3

so in your case

x=0
(x + 1) = 0
(x - 5) = 0
(x - 7) = 0

Answer 4

See that?

Answer 5

ooooooo now i do!