exam Maths Puzzle Numerical Ability

Find all the numbers for which the rational expression is undefined:
q^3-8a/q^2-64

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exam Other Question

Can you help me solve this problem:
the square root of (x-11) - the square root of x= -1 The length of a rectangle is 4 cm less that three times its width. If the length is increased by 8 cm and the width is decreased by 2 cm, the perimeter will be 100 cm. Find the dimensions of the orifinal rectangle.