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We will look at four methods: solution by factorisation, solution by completing the square, solution using a formula, and solution using graphs 9 IV SOLVING QUADRATIC EQUATIONS BY COMPLETING THE SQUARE ffMathematics – Grade 9 Quarter 1 – Module IV: Solving Quadratic Equation by Completing the Square Republic Act 8293, section 176 states that: No copyright shall subsist in any work of the Government of the Philippines. In math, a quadratic equation is defined as According to Math Is Fun, real-world examples of the quadratic equation in use can be found in a variety of situations, from throwing a ball to riding a bike. Give your answers in surd form. 3x 3 − 16x 2 + 5x = 0 9. , for x2 = 49), taking square roots, completing the square, the quadratic formula and factoring, as appropriate to the initial form of the equation. We will use two different methods. Free trial available at KutaSoftware. 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