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September 19, 2014

September 19, 2014

Posted by **David** on Monday, August 4, 2014 at 7:52pm.

I added the a^2-b^2+20 and a+b+20, but i couldn't get the answer to equal a-b.

- math hw -
**Damon**, Monday, August 4, 2014 at 8:16pmHey (a^2-b^2)= (a+b)(a-b) remember

forever

(a+b)(a-b) = 20

2(a-b) = 20

a - b = 10

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