ABSTRACT
A cubic equation of the form ax 3 + bx 2 + cx + d = 0 https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429294402/968186b9-ffa4-4f2b-aa54-7fc58a604561/content/eq2186.tif"/> may be solved graphically by:
plotting the graph y = ax 3 + bx 2 + cx + d https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429294402/968186b9-ffa4-4f2b-aa54-7fc58a604561/content/eq2187.tif"/> , and
noting the points of intersection on the x-axis (i.e. where y = 0).
