exam Maths Puzzle Numerical Ability

plot x^2+4.y^2-4.x-8.y+4=0

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exam Other Question

In a right triangle, one of the legs is 2 feet longer than the shorter leg. The hypotenuse is 10 feet. Find the lenghths of the missing 2 sides of the triangle. Hi I need help I have no Idea how to solve these problems or what steps to take it seems easy but I dont know what Im doing please help me.

An example of a queshtion is Find thee consecutive odd integers whose sum is 117.
Thanks Dominik