Divide by 2 X^2+5/2x+1/2 Subtract 1/2 and then take the middle number divide by two and the. Square it. Add it on the other side X^2+5/2x+25/16=-1/2+25/16 Take x+ 5/4 squared (X+5/4)^2=17/16 Subtract 5/4 X=-3/16 Or if you don't need x it would be (x+5/4)^2+17/16