How do you factor X^4-9X^2+12X-4 completely

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X^4-9X^2+12X-4
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1 Answer

This is what I would do:

X^4-9X^2+12X-4
x(x^3-9x+12)-4
x(x(x^2-9)+12)-4
x(x((x+3)(x-3))+12)-4
by Level 5 User (14.8k points)

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