Question

Could someone explain to me how they did this?

Answer 1

isn't the explanation there already o.O

Answer 2

Yea, but I don't understand the explanation :{

Answer 3

domain restriction number 1: \[\frac{1}{f(x)}\] when you have an x in the denominator...to find the restriction..you just equate it to 0

Answer 4

in your problem 3x^3 is the denominator...it has an x so equate it to 0

3x^3 = 0
x^3 = 0

x = 0 <---this is the domain restriction which means the graph is true for all values of x EXCEPT x = 0

Answer 5

the other step was simplification

Answer 6

5x^2 - 4x = x(5x - 4)

Answer 7

since there's an x in the numerator AND denominator you can cancel

Answer 8

got it now?

Answer 9

oohh yea I get it :D Thanks!