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Factor By Grouping x^3+5x+9x+45
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5 votes
Factor By Grouping
x^3+5x+9x+45

User Stefan Holdermans
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1 Answer

5 votes

Answer:

Explanation:

I suppose it is


x^3+5x^2+9x+45=x^2(x+5)+9(x+5)\\=\boxed{(x+5)(x^2+9)\ in \ \mathbb{R}}\\\\=(x+5)(x-3i)(x+3i) \ in \ \mathbb{C}\\

User Nneko
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