It's a second degree equation in 'x' that has no real solution.
No real number in the place of 'x' can make that equation a true statement.
There are only two "imaginary" numbers that 'x' can be:
+ 4i sqrt(5)
- 4i sqrt(5)
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It is: 3x2+6x-11 = 0
63828
It is a quadratic equation.
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