1.4/2=0.7
0.7 squared =0.49
$$\\x^2+1.4x+0.49=1.2+0.49\\x^2+1.4x+0.49=1.69\\(x+0.7)^2=1.3^2\\x+0.7=\pm 1.3\\x=0.6 \;\;or\;\;x=-2$$
