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f(x)=64x^4-192x^3+x^2-3x

please solve
 

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Steve S. | Tutoring in Precalculus, Trig, and Differential CalculusTutoring in Precalculus, Trig, and Diffe...
5.0 5.0 (3 lesson ratings) (3)
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f(x) = 64x^4 - 192x^3 + x^2 - 3x
 
f(x) = x(64x^3 - 192x^2 + x - 3)
 
f(x) = x( 64x^2(x - 3) + 1(x - 3) )
 
f(x) = x(x - 3)(64x^2 + 1)
 
f(x) = x(x - 3)((8x)^2 – (i^2))
 
f(x) = x(x - 3)(8x – i)(8x + i)
Lily M. | CPA with 10+ years experience fluent in ChineseCPA with 10+ years experience fluent in ...
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f(x)=64x4-192x3+x2-3x=x(64x3-3*64x2+x-3)=x[64x2(x-3)+(x-3)]=x(x-3)(64x2+1)