1,326 prompts matching "Rationalising the denominator when it's a surd minus a surd"
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Learn: Finding alpha squared plus beta squared from the sum and product
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Final Revision: Checking a symmetric-function answer by solving the equation outright
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Worked Example: Evaluating a polynomial by substitution
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Explain Back: Finding an unknown coefficient given that a stated factor divides the polynomial
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WAEC Prep: Sketching a cubic from its factorised form
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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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Final Revision: Checking that the roots found satisfy the original equation
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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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Explain Back: Arrangements in which two particular objects must stay together
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Common Mistakes: Arrangements restricted at the first or the last place
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Final Revision: Counting the number plates or codes that can be formed under a rule
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Practice: Choosing a committee that must contain one particular person
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Explain Back: Choosing a committee with a stated number from each of two groups
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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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Final Revision: Proving an identity by working on one side only
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Common Mistakes: Giving the general solution of a trigonometric equation
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