SOLUTION: Factor y^2-9y+81

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Question 614665: Factor
y^2-9y+81

Answer by asuar010(338)   (Show Source): You can put this solution on YOUR website!
cannot be fcatored
Solved by pluggable solver: SOLVE quadratic equation with variable
Quadratic equation (in our case ) has the following solutons:



For these solutions to exist, the discriminant should not be a negative number.

First, we need to compute the discriminant : .

The discriminant -243 is less than zero. That means that there are no solutions among real numbers.

If you are a student of advanced school algebra and are aware about imaginary numbers, read on.


In the field of imaginary numbers, the square root of -243 is + or - .

The solution is

Here's your graph:

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