Question 247381
{{{2x^2 = 30}}} is not in the form to solve using the quadratic equation.  You have to get it organized in standard form.
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Subtract 30 from both sides.
{{{2x^2 - 30 = 0}}}
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Dividing both sides by 2.
{{{x^2 - 15 = 0}}}
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Obviously, this is a parabola that is centered on the y-axis and crosses the y-axis at -15.
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Can this be factored?  Yes.
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{{{(x + sqrt(15))(x - sqrt(15)) = 0}}}
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Perhaps odd looking, but not unreasonable.  Or you can use the quadratic:
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*[invoke quadratic "x", 1, 0, -15 ]