exam Maths Puzzle Numerical Ability

please help me understand how to Factor the following polynomial

4x^4 - 4x^2 + 1

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exam Other Question

Use indirect reasoning to show that an equilateral triangle cannot have a right angle. Quadratic equations can be solved by graphing, using the quadratic formula, completing the square, and factoring.
I. What are the pros and cons of each of the methods?
II. When m