Posted by Natalie on Monday, July 25, 2011 at 3:55pm.
Use the “difference of squares” rule to factor the following expression
494y^2
my answer is going to be (72y)(72y)
I wasn't sure if it could of been (72y)(7+2y)

math  Sam, Monday, July 25, 2011 at 4:20pm
Your answer should be (72y)(7+2y).
If you multiply the first equation (72y)(72y) it would equal 4914y14y+4y^2. After simplifying it would equal 4928y+4y^2. The second option multiplies out to 49+14y14y4y^2. The 14y's cancel each other. That leaves 494y^2. Hope that helps.

math  Natalie, Monday, July 25, 2011 at 11:30pm
Thank You So Much Sam! :)
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