SOLUTION: how do you find the number of complex roots in a equation such as {{{ a^2-81=0 }}}

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Question 416594: how do you find the number of complex roots in a equation such as +a%5E2-81=0+
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
The fundamental theorem of algebra says that there are two complex roots to the equation. Note that the two roots, 9 and -9, are still considered complex.