exam Maths Puzzle Numerical Ability

1)Graph f(x)=(x^2 - 4)/(x - 2) using a graphing calculator. Using a standard window with the trace feature, trace the graph to x=2. What happens?

Why is there a "break" in the

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exam Other Question
Factor completely.

4x^6 - 4x^2 between any two real numbers there is another real number. What is it called??