AM-207

Sum and difference of cubes

A Math · Secondary 3 · Easy · Sum and difference of cubes

1. $(3x-2)(9x^2+6x+4)$
2. $(3x+2)(9x^2-6x+4)$
3. $(3x-2)(9x^2-6x+4)$
4. $(3x+2)(9x^2+6x+4)$

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