SOLUTION: I do not understand how to work through this problem or even where to start. Any help in greatly appreciated. Thank you in advance. Simplify and Combine like terms: (8x-5)(x^

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I do not understand how to work through this problem or even where to start. Any help in greatly appreciated. Thank you in advance. Simplify and Combine like terms: (8x-5)(x^      Log On


   

Question 670583: I do not understand how to work through this problem or even where to start.
Any help in greatly appreciated. Thank you in advance.
Simplify and Combine like terms: (8x-5)(x^2+6x)-(9x+2)(4x^2-3)
Answer: -28x^3+62x^2-24x
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

(8x-5) (x^2+6x) -(9x+2)(4x^2-3)= 

8x(x^2+6x)-5(x^2+6x)-9x(4x^2-3)-2(4x^2-3)] 

8x^3 + 48x^2 -5x^2 - 30x.....etc              ||finish Up, combine Like terms

 You can see the 8x^3 - 36x^3 = -28x^3