How to solve the equation $y = \frac{x^2}{20000} + 0.0046x + 62.054$ for $x$?

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So I have an equation I am trying to solve for x.

$y = \frac{x^2}{20000} + 0.0046x + 62.054$

I can solve it up until this part, and then my mind just blanks.

$$\left(\frac{y-62.054}{0.0046}\right) \cdot 20000 = x^2 + x$$

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Hint: Use quadratic formula !...............