Mathematics 0580 · IGCSE · Graphs of functions

Graphs of functions — practice question

The graph of $y = x^3 + 4x^2 - 2$ is shown in the diagram for $-3 \le x \le 1.5$.

(main)[3]

Use a suitable straight line to solve $x^3 + 4x^2 - 2 = 2x$ for $-3 \le x \le 1.5$.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The line $y=2x$ has been excluded” …