Solving quadratic equations

A quadratic equation like x^2 + 5x + 6 = 0 can be solved by factoring, as (x+2)(x+3) = 0, giving x = -2 or x = -3, by taking square roots, completing the square, or the quadratic formula, and a system made of one linear and one quadratic equation can be solved the same way you'd solve any system: by finding where their graphs intersect.

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