(a)[2]
Show that $y = (x + 2)(x - 1)^2$ may be rewritten as $y = x^3 - 3x + 2$.
(b)[4]
Use a suitable straight line to solve the equation $2x^3 - 5x = 0$.
Mathematics 0580 · IGCSE · Algebraic manipulation
Algebraic manipulation — practice question
The diagram on the grid shows the graph of $y = (x + 2)(x - 1)^2$.