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What is 3x^4+15xy-27xy^3? anyone..? it's factoring

its for school and i'm so confused as to how you factor this

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The common factor in the equation is x, which means we'll try and have the x outside on a bracket. Since the common factor is x, we'll have x (3x3 + 15y - 27y3). In the same equation, another factor of x can emerge, which is 3x (x3 + 5y - 9y3).

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Mathway.com

It will show you all of the steps too

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What is the common factor in the 3 terms of the equation (factor found in the 3 terms) --> it is (x). So if we took x outside, the equation will be;
x (3x^3 + 15y - 27y^3)
There is another common factor, which is 3;
3x (x^3 + 5y - 9y^3)

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