You can

put this solution on YOUR website! 1.2x^2 - 3.1x -4.5=0
Press ON
Press CLEAR
Press Y=
After \Y1 and after \Y2 type so that you see this
\Y1=1.2X^2-3.1X-4.5
\Y2=0
Press ZOOM
Press 6
Press 2ND
Press TRACE
Press 5
Press ENTER
Press ENTER
Press ENTER
Read at bottom of screen
X=-1.03608 Y=0
One zero is -1.03608
Press 2ND
Press TRACE
Press 5
Press ENTER
Press ENTER
Press right arrow 15 times to get cursor nearer to other zero
Press ENTER
Read at bottom of screen
X= 3.619413 Y=0
The other zero is 3.619413
Edwin