Question

Year 10

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14/38 Marks
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Expand and simplify (x + 3)(x - 3)(3x + 2)

Answer 1

=3x³+2x²−27x−18

Explanation:

(x+3)(x−3)(3x+2)

=((x+3)(x−3))(3x+2)

=((x+3)(x−3))(3x)+((x+3)(x−3))(2)

=3x³−27x+2x²−18

=3x³+2x²−27x−18