A cubic equation
The cubic equation is . Again, this is the curve we are solving: where does it meet the -axis? Press 
, 
, 
. Then enter the four coefficients: 5, 
, 4, , 3, , and 7.
The cubic equation is 5x3+4x2+3x+7=0. Again, this is the curve we are solving: where does it meet the x-axis? Press , , . Then enter the four coefficients: 5, , 4, , 3, , and 7.
▶ Watch this step in the video (1:24:12)