factor

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Factor 3x^2 - 4x + 1

these aswell

x^2 - 16
x^2– 6x + 9
a^2- 2ab + b^ 2
x^2+ 6x -16
x^2– 6x -16

(3x +a )(x +a )

3a +a= -4, so what is a?

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