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D. Solving Quadratic Equations Using Square Roots

Factoring works best for quadratic equations written in standard form, which are relatively easy to factor. If given a quadratic equation in vertex form, you can solve by first isolating the squared binomial and then taking the square root. If given a quadratic equation in standard form that is not easily factored, you can apply the process of completing the square, converting the equation into vertex form, and then solving for \(x\).