Maths

f(x)=4x³-8x²-x+2
I'm having trouble factorising this one completely. I know that x-2 is a factor.
Please help!

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  1. 4x2(x - 2) - (x - 2)
    (4x2 - 1)(x - 2}
    difference of two squares!
    (2x - 1)(2x + 1)(x - 2)

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