Answers

2014-09-03T08:53:17+08:00
 2x^2+7x+3=0\\\\ 2x^2+ x+6x+3=0\\\\ x(2x + 1)+3(2x+1)=0\\\\(2x+1)(x+3)=0\\ \\2x+1=0\ \ or \ \ x+3=0 \\\\2x=-1\ \ or \ \ x=-3 \\\\ x=-\frac{1}{2}\ \ or \ \ x=-3
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i need the COMPLETING OF SQUARE FORMULA..