SOLUTION: Factor completely: 21x^3 + 12x^2 - 35x - 20

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Question 912778: Factor completely: 21x^3 + 12x^2 - 35x - 20
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!

21x%5E3+%2B+12x%5E2+-+35x+-+20

%2821x%5E3+%2B+12x%5E2%29%2B%28-35x+-+20%29

3x%5E2%287x+%2B+4%29-5%287x+%2B+4%29

%283x%5E2-5%29%287x+%2B+4%29

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So 21x%5E3+%2B+12x%5E2+-+35x+-+20 factors to %283x%5E2-5%29%287x+%2B+4%29

Note: the order of the factors does not matter

Let me know if you need more help or if you need me to explain a step in more detail.
Feel free to email me at jim_thompson5910@hotmail.com
or you can visit my website here: http://www.freewebs.com/jimthompson5910/home.html

Thanks,

Jim