1,325 prompts matching "Rationalising when both terms of the denominator are surds"
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Worked Example: Simplifying an expression carrying both a negative and a fractional index
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Show All Working: Solving a logarithmic equation and rejecting the invalid root
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Explain Back: Finding alpha squared beta plus alpha beta squared
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WAEC Prep: Forming an equation whose roots are alpha over beta and beta over alpha
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Show All Working: Finding a coefficient given a stated relation between the roots
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Final Revision: Checking a symmetric-function answer by solving the equation outright
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Quiz: The factor theorem, and testing whether x minus a is a factor
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Explain Back: Forming a cubic equation whose three roots are given
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Spot My Mistake: The relations between roots and coefficients for a quartic
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WAEC Prep: Finding a coefficient of a cubic given one of its roots
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Final Revision: Checking that the roots found satisfy the original equation
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Learn: Solving a linear inequality, and reversing the sign on dividing by a negative
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Show All Working: Solving a pair of simultaneous linear inequalities
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WAEC Prep: Circular permutations of n objects round a table
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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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Explain Back: Choosing a committee with a stated number from each of two groups
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Show All Working: Counting the handshakes, or the lines joining n points
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Common Mistakes: Selections in which at least one of a kind must appear
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