# SOLUTION: By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained.      Log On

 Click here to see ALL problems on Linear-systems Question 551780: By graphing the function on your calculator (TI-83) find the solutions of 1.2x^2 - 3.1x -4.5=0 to three decimal places. Explain how answer was obtained. Found 2 solutions by richard1234, Edwin McCravy:Answer by richard1234(6688)   (Show Source): You can put this solution on YOUR website! The best way is probably to trace the function and find the points where the graph meets the x-axis. Additionally, you could use the "solve" function or Newton's method. You should obtain x = -1.036 and x = 3.619 as your roots. Answer by Edwin McCravy(13211)   (Show Source): 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```