exam Maths Puzzle Numerical Ability

I need help with this because it just hasent been comeing out right i asked my friend but he dosent know. And its just intercepts its hard.

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exam Other Question

Find the distance between the given pair of points (round your answer to the first decimal point if necessary).
(-7,-3), (8,6).
Solve for each equation.
-2x^2-5x+12=0