Expert: Richard J. Raridon - 7/15/2009

Question
Please help me with these. I don't understand any of them. I need to show my work on how I came up with these answers. Can you help me please? Here are the following problems:

Simplify the following:

2. (4x^3-6x^2+5)-(x^2+7x^2-8x-2)
Answer:
Show your work:

3. x^3(2x-1)
Answer:
Show your work:

4. (3x+2)(7x+2)
Answer:
Show your work:

Factor the following:

6. x^3-64
Answer:
Show your work:

7. x^3+w^3
Answer:
Show your work  

Answer
2. Just combine like terms to get 4x^3-14x^2+8x+7
3. Just multiply it out to get 2x^4-x^3
4. 3x(7x+2)+2(7x+2) = 21x^2+20x+4
6. one factor is (x-4)
divide that into x^3-64 and get the other factor (x^2+4x+16)
7. one factor is (x+w)
divide that into x^3+w^3 and get the other factor (x^2-wx+w^2)