Question: 1. Solve the equation 2x2 + 6x - 20 = 0. 2. Find the solutions of x2 - 4x - 21 = 0. 3. Determine

1. Solve the equation 2x2 + 6x - 20 = 0. 2. Find the solutions of x2 - 4x - 21 = 0. 3. Determine whether the vertex of the function is a maximum or minimum, and find its coordinates. f(x) = -2x2 + 32x - 126

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