SOLUTION: Factor by grouping. 48x^3 + 42x^2 – 8x – 7 im kinda at a loss right now with this one, please help.

Algebra ->  Systems-of-equations -> SOLUTION: Factor by grouping. 48x^3 + 42x^2 – 8x – 7 im kinda at a loss right now with this one, please help.      Log On


   

Question 126885: Factor by grouping. 48x^3 + 42x^2 – 8x – 7 im kinda at a loss right now with this one, please help.
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
48x%5E3+%2B+42x%5E2+-8x+-7.....group first and third term together, then group second and fourth term together
%2848x%5E3-8x%29++%2B+%2842x%5E2+-7%29.....factor out common 8x from first group, and common 7 from the second group
8x%286x%5E2-1%29++%2B+7%286x%5E2+-1%29.....combine like terms
%288x%2B+7%29%286x%5E2+-1%29.....