Question 1099745
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Find the complete factorization of p(x)= x^4-2x^3+10x^2-18x+9
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<pre>
  {{{x^4 - 2x^3 + 10x^2 - 18x + 9}}} = 

= {{{(x^4 - 2x^3 + x^2)}}} + {{{(9x^2 - 18x + 9)}}} = 

= {{{x^2*(x^2 - 2x + 1)}}} + {{{9*(x^2-2x+1)}}} = 

= {{{x^2*(x-1)^2}}} + {{{9*(x-1)^2}}} = 

= {{{(x^2+9)*(x-1)^2}}}.
</pre>

Grouping and re-grouping method.