Posted by Monte' on Tuesday, October 30, 2007 at 7:51pm.
Factor each expression. Please show me how to do it. Thanx
8x^210x+3
15X^2x2
8X^218X5
2x^25x88
3x^2+43x30
3x^2+7x2
10^289x+156
4x^2+11x+13
3x^242x+147
5x^220x+20

Math  drwls, Wednesday, October 31, 2007 at 2:28am
Break the coefficeint of the x^2 term and the constant both into prime number factors (a*b) and (c*d), and then try various combinations of (ax+c)(bx+d) until you find one that works.
For 8x^210x+3, choose 4 and 2 for the factors of 8 and 3 and 1 for the factors of 3.
(4x  3)(2x  1) works!
The pair of minus signs before 3 and 1 is needed to make the 3 positive and 10 negative in the final product
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