Question: How do I factor this problem completely? 9x^4(7x^7+5x^3+12) I know it goes like this: 9x^4((x+1)(7x^6-7x^5+7x^4-7x^3+12x^2-12x+12)) Then: 9x^4(x+1)(7x^6-7x^5+7x^4-7x^3+12x^2-12x+12) However, how do I get (x+1) from the

How do I factor this problem completely?
9x^4(7x^7+5x^3+12)
I know it goes like this: 9x^4((x+1)(7x^6-7x^5+7x^4-7x^3+12x^2-12x+12))
Then: 9x^4(x+1)(7x^6-7x^5+7x^4-7x^3+12x^2-12x+12)
However, how do I get (x+1) from the first step?

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