What is the standard form of # y=3x(x+9)(x+18) #?
The general standard form of a cubic function is
Since what you are currently given is the factored form, you need to expand the equation to get the standard form.
For this example, I chose to expand the 2nd and 3rd terms first before inputting in the 1st. Note that you may choose whichever terms you want to expand first but I suggest that you consider expanding those that would not give you really big numbers so as to lessen the probability that you will incur errors in calculations.
[Solution if choose to expand the 1st and 2nd term first]