2x2 + 6 = 30 is your statement.
2x2 = 24
x2 = 12
x = ±√12
x = ±√(4*3)
x = 2√3 or x = -2√3
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Yes it is. The thing that makes it a quadratic equation is that "x squared" in there.
2x2 + 2x - 8 = 2(x2 + x - 4). This can take any value greater than or equal to -8.5
It is a quadratic equation.
x2 + x2 = 2x2 2x^2