Solving by completing the square: rational solutions | Algebra 1 (IM® v.360 aligned) | Khan Academy

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https://www.khanacademy.org/math/algebra-1-illustrative-math/x6418b49dfbc9d0c9:quadratic-equations-part1/x6418b49dfbc9d0c9:completing-the-square-part-2/v/solving-by-completing-the-square-rational-solutions

Express a quadratic equation in the form (x+p)^2=q, and use completing the square to solve quadratic equations in which the squared term has a coefficient of 1.

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