Respuesta :

ChuHua

[tex]3 x - 9 x ^ { 2 } \\ = 3\left(x-3x^{2}\right) \\ = x\left(1-3x\right) \\ = \boxed{ 3x\left(-3x+1\right) }[/tex]

  • Take the common factor out & then rearrange the terms.

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