CUBICS MATH PROBLEM - How do I expand this cubic form?
The questions on the book says:
3. From the cubic form, give your answer in factor form and in expanded form
My cubic function/form is: 2(x+1)2 (x-3)
1ST STEP: (solve the square, by re-writing the bracket) 2(x+1) (x+1) (x-3)
2ND STEP: (ignore the first bracket and work with the other two) (x+1) (x-3)
3RD STEP: (expand both brackets) x2-3x+x-3
4TH STEP: (then bring back the bracket which was ignored) 2(x+1) x2-3x+x-3
HERE COMES MY QUESTION. what do I do now? Before I was suppose to multiply what I expanded with the "ignored bracket" but there is a 2 in the middle of the way, what to do I do???
THE CORRECT ANSWER: 2x3-2x2-10x-6