exam Maths Puzzle Numerical Ability

Why is it important to simplify radical expressions before adding or subtracting?

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exam Other Question

Write an equation of a line through the given points.

(4,3) (-2,1)

In know the answer being, y=1/3x+1 2/3... It says the answer in the back of the book. Now could someone explain how to come upon this answer?? Can you please take the time to help me solve this problem: If f(x) = x2 and g(x) is equal to when f(x) is shifted 2 units upward and 1 unit leftward, then find g(x). Also If f(x)