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posted by kaitlin on Thursday, December 3, 2009 at 11:17pm.
2x^2+x-28=0 Solve by completing the square
2x^2+x = 28 divide by 2 x^2 + x/2 = 14 add 1/16 to both sides x^2 + x/2 + 1/16 = 14 + 1/16 x+1/4)^2 = 225/16 x + 1/4 = ± 15/4 x = -1/4 ± 15/4 = 7/2 or -4
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