4. Two students solve a quadratic equation in x. One student made a mistake in the coefficient of the linear term and found the roots to be 1 and 2, while the other made a mistake in the constant term and found the roots to be -1 and 2. What was the correct quadratic equation? A. x2 – x – 2 = 0      B. x2 + x – 1 = 0     C. x2 – x – 1 = 0    D. x2 – x + 2 = 0   15. If y varies directly as x and inversely as z, and y = 5 when x = 2 and z = 4, find y when x = 3 and z = 6. A. 2        B. 3       C. 5       D. 6

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A: Topic- Quadratic Equation

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