茶叶哪些茶叶是茶粉--

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最佳答案The quadratic formula is used to find the solutions, or roots, of a quadratic equation. It is given by:x = (-b ± √(b^2 - 4ac)) / (2a)where a, b, and c are the coefficients of the quadratic equation in the form ax^2 + bx + c = 0. The ± symbol indicates that there are two possible solutions, one with a plus sign and one with a minus sign. The term inside the square root, b^2 - 4ac, is called the discriminant.The quadratic formula can be derived by completing the square on the standard form of a quadratic equation, or by using the method of factoring. It is a very useful tool for solving quadratic equations, as it provides an explicit formula for finding the solutions.

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