Answers

2015-06-22T21:30:38+08:00
Sundin nyo lang po ang formula ito :
(a+b)(a-b) =  a^{2} -  b^{2}

ex.
(3x +4)(3x-4) =  9x^{2} - 16
Basta po laging negative yung second term or you can use the foil method po or the tuktok system.
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