1,324 prompts matching "Why does completing the square work"
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Common Mistakes: Adding, subtracting and multiplying two polynomials
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Explain Back: Forming a cubic equation whose three roots are given
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WAEC Prep: Finding a coefficient of a cubic given one of its roots
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Common Mistakes: Three roots in geometric progression in a cubic
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Quiz: Solving a quadratic inequality using a sign table
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Explain Back: Solving an inequality that involves a modulus
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WAEC Prep: Writing a solution set in interval notation
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WAEC Prep: Circular permutations of n objects round a table
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Quiz: Choosing a committee of r people from n
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Explain Back: Choosing a committee with a stated number from each of two groups
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Common Mistakes: Selections in which at least one of a kind must appear
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Explain Back: Solving a quadratic in sin x
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WAEC Prep: Solving an equation by first applying a double angle formula
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Final Revision: Losing solutions by dividing through by cos x
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WAEC Prep: A phase shift in y equals sin of x minus d
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Common Mistakes: Identifying a conic from a general second-degree equation
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Explain Back: A particle on a rough table connected to a hanging particle
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Explain Back: A car on a banked track
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Final Revision: Showing that a given motion is simple harmonic
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WAEC Prep: Two elastic strings supporting one particle
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