exam Maths Puzzle Numerical Ability

16 2(x-4)
--- + ------
x2-16 x+4

Adding Rational Expressions

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exam Other Question

Please help me solve this problem

Write each expression as a complex number in the form of a + bi

5i - the square root of -84.

Thanks! The second hand on a clock is 6 inches long. How far does the tip of the hand move in 40 seconds?