exam Maths Puzzle Numerical Ability

Solve this equation: (x^3-6x^2-40x=0)

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exam Other Question

The vertices of a right triangle are (6,5), (2,1), and (8,1). What are the coordinates of the midpoint of the hypotenuse?

Answer Choices:

A) (6,3)
B) (4,3)
C) (5,1)
D) (8,3)
can you give three examples of something you do, that process using a polynomial?

I can give the examples of somethhing we would possibly use them, but not sure how to confidently answer this question, and need some assistance. Thanks