Part of the Quadratic Equation Article states:

"which is in turn proportional to the square of the length of the side. In mathematical terms, if (x) is the length of the side of the field, (m) is the amount of crop you can grow on a square field of side length 1, and (c) is the amount of crop that you can grow, then"

"m" and "c" sound like the same thing? Is this a typo?

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