ABSTRACT
Architects, surveyors and a variety of engineers in fields such as biomedical, chemical, electrical, mechanical and nuclear, all use equations which need solving by one means or another. This chapter aims to solve a linear and simultaneous equation simultaneously by graphical means and solve two simultaneous equations graphically. A graph of a quadratic equation always produces a shape called a parabola. The number of solutions, or roots of a quadratic equation, depends on how many times the curve cuts the x-axis and there can be no real roots or one root or two roots. The solution of linear and quadratic equations simultaneously may be achieved graphically by: plotting the straight line and parabola on the same axes, and noting the points of intersection. The co-ordinates of the points of intersection give the required solutions.
