Five mark example problems I — task. Mathematics State Board, Class 9.

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Factorise \(x^3 + 13x^2 + 32x + 20\) into linear factors.

Answer:

\(x^3 + 13x^2 + 32x + 20 =\)

\((x + 1)(x - 2)(x + 10)\)
\((x - 1)(x + 2)(x + 10)\)
\((x + 1)(x + 2)(x + 10)\)
\((x + 1)(x + 2)(x - 10)\)

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