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Mathematics, 30.09.2021 23:50 CXS2003

Read the conjecture shown. *All quadratic equations with a vertex above the z-axis have no real roots."
Which equation refutes the given conjecture?
O A y=x^2+ 2
O B. y=x^2 - 2
OC. y=-^2+2
OD. y=-^2 - 2

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