Answers

2014-02-27T20:39:10+05:30
15x^2-8x-12
15x^2+10x-18x-12
5x(3x+2)-6(3x+2)
(3x+2)(5x-6)
Therefore, x=-2/3 & x=6/5
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2014-02-28T09:55:04+05:30
15 x² - 8x - 12=0
15x² +10x - 18x - 12 =0
5x(3x+2) -6(3x +2)=0
(3x+2)(5x-6)=0
factors of 15x² - 8x -12 are 
x= -2      or     x=
    3                   5
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