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Allday Everyday Math on Instagram: "How to Use the Quadratic Formula This problem shows 2x² - 7x - 13 = -10. Before you can use the quadratic formula, you need the equation in standard form (ax² + bx + c = 0). Add 10 to both sides to get 2x² - 7x - 3 = 0. Now identify your values: a = 2, b = -7, and c = -3. Write out the quadratic formula: x = (-b ± √(b² - 4ac))/2a. Substitute your values carefully. Start with b² - 4ac under the square root. That's (-7)² - 4(2)(-3) = 49 - (-24) = 49 + 24 = 73. N
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