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April 19, 2014

April 19, 2014

Posted by **Lea** on Thursday, March 7, 2013 at 6:07pm.

- Algebra -
**Dr. Jane**, Thursday, March 7, 2013 at 6:19pmYou can multiply these binomials like any other.

x times x and x times 7

then -7 times x and - 7 times 7

x^2 + 7x - 7x -49

x^2 -49

Or you can recognize this pair as a sum and difference which always multiplies to be the difference of two squares.

(a+b)(a-b) = a^2 -b^2

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