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December 22, 2014

December 22, 2014

Posted by **Alicia** on Sunday, November 18, 2007 at 10:04pm.

x(squared)+7x+10=0

(x+r)(x+s)

=x(squared)+sx+rx+rs

=x(squared)+(r+s)x+rs

x(squared)+(r+s)x+rs=x(squared)+7x+10

r+s=7

rs=10

(2)(5)=10 and 3+4=7

x(squared)+7x+10=(x+5)(x+2)

- College Algebra -
**Reiny**, Sunday, November 18, 2007 at 10:16pmyes, you are right,

For these kind of problems why don't you just expand your answer using FOIL to check if you are right?

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