Answers

2014-07-09T10:54:29+08:00
Special Product To Solve That Problem Could Be Either FOIL METHOD Or Pattern :)
FOIL METHOD :
(10x+3y)(10x-3y)
F- 100 x x^{2}
O - -13xy
I - 13 xy
L- -9 y^{2}

Ans;
  100 x^{2} + (-13+13)xy - 9 y^{2}
 = 100 x^{2} - 9 y^{2}

PATTERN :
(10x+3y)(10x-3y)
(10x) ^{2} + (-3y+3y)10x - 9 y^{2}

== 100 x^{2} - 9 y^{2}
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2014-07-09T14:57:17+08:00