Answers

2014-10-12T16:33:29+08:00
(x-7)(7x+4) = 7x^2 - 45x - 28 
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2014-10-12T18:32:29+08:00
(x-7)(7x+4)
= 7x^2 +4x -49x -28
Simplify, and this is the answer ---> 7x^2 -45x -28
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