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It's an equation.

If you want to solve it for x, you can do so as follows:

x2 + 15x = 30

x2 + 15x + (15/2)2 = 30 + (15/2)2

(x + 15/2)2 = 30 + 225/2

x + 15/2 = ± √(285/2)

x = (-15 ± √570) / 2

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11y ago

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