721 prompts matching "Checking a factorisation by expanding it again"
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Laws of indices with three different bases in one line
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Simplifying before substituting a value
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Solving an equation with a fractional exponent on x
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Verifying an index law with numbers
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Evaluating (1/2)^-3 without a calculator
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Index expression with three unknown letters
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Rationalising a denominator with a surd and integer
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Surds combined with algebraic terms
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Rationalising a denominator with three surd terms
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Complement of a set within a universal set
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Finite and infinite sets
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Empty set and its notation
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A three-region overlap problem with unknowns
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Common mistakes with set notation
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Finding the nth term of an arithmetic sequence
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Sum of the first n terms of an arithmetic series
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Applying the sum to infinity formula when the ratio lies between minus one and one
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Arithmetic mean between two numbers
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Solving for x when three terms are in arithmetic progression
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Recurring decimals as an infinite geometric series
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