exam Maths Puzzle Numerical Ability

Solve the equation:
y^2 - 2y - 24 = 0

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exam Other Question

Let P = (-25,0), Q = (25,0), and R = (-24,0). Find an equation for the circle that goes through P, Q, and R. Find at least two ways of showing that angle PRQ is right, and find coordinates for the three other points R that would have made angle PRQ right. Convert the given coordinates to the equivalent polar form: (radical 3, -1))