Okay so I did all fifty Aleks' for the week and my head is about to explode. I don't think I have ever done so much math in three days in my life so I'll do my blog on one of the Aleks modules. Factoring a quadratic with a leading coefficient greater than one...
Ex :
5y^2 + 13y - 6
Use the FOIL method backwards...
The coefficient of 
is 
. Using whole numbers, only 1 and 5 can be multiplied to get .
So you have to find two integers 
and 
such that 5y^2 + 13y - 6 = ( 1y + p) ( 5y + q )
Using the FOIL method to expand the right-hand side of this equation, you get that ( pq ) = -6 and q + 5p = 13
You'll find that 3 and -2 work...3 in place of p and -2 in place of q.
The answer is 
No comments:
Post a Comment