exam Maths Puzzle Numerical Ability

If i have a triangle at the cordinates are B(-4, 5), C(12, 10) and A(9,-6). How do i find the perppendicular bisector side AC? I know you find the midpoint but what do you do after that?

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Hi. May I have some help finding solutions to the equation?

Find all real solutions of the following equation. (If there are extra answer boxes, enter NONE.)

x^3 - x^2 + 2x - 3 = x^2 + 1 A bus for school feild trip costs P624. Since the number of persons making the trip is 13 less the capacity of the bus, it costs P8 more per student than if the bus is filled. How many students are in the trip?