This week in cal we did some integrating thing, which im having a little difficulty with but i am slowly starting to get it. I didnt bring my notes home on it, so ill talk about some aleks stuff.
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.
Tomorrow we have a quiz on the integration stuff, i hope i do good.
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