Mathematics 0580 · IGCSE · Algebraic manipulation

Algebraic manipulation — practice question

The graph of $y=(x-3)(x+b)(x+2)$ cuts the y-axis at $-30$.
(a)[2]

Find the value of $b$ from the information given.

(b)[1]

State the coordinates of this point.

Worked solution & mark scheme

This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct use of substitution” …

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