AM-1533

Sum and difference of cubes

A Math · Secondary 4 · Easy · Sum and difference of cubes

1. $(x-3)(x^2+3x+9)$
2. $(x+3)(x^2-3x+9)$
3. $(x-3)(x^2-3x+9)$
4. $(x+3)(x^2+3x+9)$

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