Answers

2014-05-05T13:32:42+05:30
4x2-9x+2
= 4x2-(8+1)x+2
= 4x2-8x-x+2
= 4x(x-2)-1(x-2)
= (4x-1)(x-2)
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2014-05-05T13:40:40+05:30
Multiple coeff.. of x^2 with const :>4 X 2=8 
so 8 is product and 9 is sum 4x^2-8x-1x +2=0
4x(x-2)-1(x-2)=0
(4x-1)(x-2)=0
x=1/4;;x=2
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