SOLUTION: I cannot figure this out, although I have help with this type of question before. Can you show me how to do it again. Here it is: 15(2x+1)^3+6(2x+1)^2-21(2x+1)

Algebra ->  Test  -> Lessons -> SOLUTION: I cannot figure this out, although I have help with this type of question before. Can you show me how to do it again. Here it is: 15(2x+1)^3+6(2x+1)^2-21(2x+1)       Log On


   

Question 368736: I cannot figure this out, although I have help with this type of question before. Can you show me how to do it again. Here it is:
15(2x+1)^3+6(2x+1)^2-21(2x+1)
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
15%282x%2B1%29%5E3%2B6%282x%2B1%29%5E2-21%282x%2B1%29
=3%282x%2B1%29%2A%285%282x%2B1%29%5E2%2B2%282x%2B1%29-7%29
=3%282x%2B1%29%285%282x%2B1%29%2B7%29%28%282x%2B1%29-1%29
=3%282x%2B1%29%2810x%2B5%2B7%29%282x%2B1-1%29
=3%282x%2B1%29%2810x%2B12%29%282x%29
=6x%282x%2B1%292%285x%2B6%29
=12x%282x%2B1%29%285x%2B6%29.