You can
put this solution on YOUR website!(t-2)^2=-16
t-2 = sqrt(-16) = ±4i
t = 2 + 4i
t = 2 - 4i
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| 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 -64 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 -64 is + or - .
The solution is 
Here's your graph:
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I don't know why the solver multiplied by 10, but the results are the same.