exam Maths Puzzle Numerical Ability

One root of the function y=x^2-10x+k is 5+2isqrt3. What is the value of k????

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exam Other Question

The length of a rectangle is 1 in. more than twice its width. If the perimeter of the rectangle is 32 in., find the width of the rectangle. 3m^2 + 8m + 2 =0