1,321 prompts matching "Factorising fully, and knowing when to stop"
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Worked Example: Evaluating a polynomial by substitution
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Worked Example: The sum of the products of the roots of a cubic taken two at a time
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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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Show All Working: Three roots in arithmetic progression in a cubic
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Common Mistakes: Three roots in geometric progression in a cubic
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Worked Example: Solving a quadratic inequality by sketching the parabola
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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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Show All Working: Solving a pair of simultaneous linear inequalities
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Common Mistakes: The range of values of x for which an expression stays positive
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Worked Example: The number of arrangements of n different objects in a row
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WAEC Prep: Circular permutations of n objects round a table
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Show All Working: Arrangements of the letters of a given word
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Common Mistakes: Arrangements restricted at the first or the last place
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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: The compound angle formula for tan of A plus B
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WAEC Prep: The three forms of the double angle formula for cosine
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Common Mistakes: Expressing a cos x plus b sin x in the form R cos of x minus alpha
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