exam Maths Puzzle Numerical Ability

Determine the number of solutions for the following equation:

x^2 - 4x + 4 = 0

Should you say there are 2 identical solutions or only 1 solution?

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exam Other Question

Factor each polynomial. If the polynomial is prime, say so
18z + 45 + zē
The vertices of a parallelogram include (-3,4), (5,4), and (-1,-2). Find the fourth vertex.