Question 1033958
#3:


{{{(x^2+9)(25x^2-100x+100)}}}
-
{{{(x^2+9)25(x^2-4x+4)}}}
{{{25(x^2+9)(x-2)^2}}}


Two complex solutions, and one real solution of multiplicity two.


#1:


Start with {{{(x-(3+4i))(x-(3-4i))(x-(5))=0}}}.
Complex solutions come as conjugate pairs.
Simplify the left side.