1.

Remove bracket and simplify (x+3)(3x^2-9+6x)

Answer»

ANSWER:

3x^{3} + 15x^{2} +9x-18

Step-by-step EXPLANATION:

x(3x^{2} -9 +6x) + 3(3x^{2} -9 +6x)\\=3x^{3} -9x + 6x^{2} +9x^{2} -18+ 18x\\=3x^{3} +6x^{2} +9x^{2} -9x +18x-18\\=3x^{3} + 15x^{2} +9x-18



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