Posted by Justwannapass on Friday, August 14, 2009 at 9:42am.
Factoring a quadratic polynomial in two variables
3x^2+17xy+20y^2

Algebra  bobpursley, Friday, August 14, 2009 at 9:45am
I know if I multiply 5x4 I get 20, and that 3x4 + 5 is 17.

Algebra  drwls, Friday, August 14, 2009 at 10:26am
(x + 4y)(_x + 5y)
Fill the blank with the only number that works.
Note the _x^2 must equal 3x^2, and (as BobPurley has stated) 5 + 4*3 = 17
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