Factorize:x3 – 3x2 + 3x - 1
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Eventually, you'll discover that x=1 is a root. This will imply that your polynomial has the form
(x−1)(ax2+bx+c),(1)
for some constants a,b,c.
To find those constants, you could do one of two things (and maybe more)
perform the division x3−3x2+3x+1x−1.
expand (1) and set it equal to the original polynomial. Setting the coefficients of the two sides of this equation equal to each other will give you a system of equations that are solvable for a, b, and c.
Once you've figured out what a,b, and c are, factor the quadratic.
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