755 prompts matching "expand (1-x)^4 fully and use it to estimate (0.98)^4"
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Show All Working: Checking a rationalised answer by decimal approximation
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Worked Example: Why multiplying by the conjugate clears the surd
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Show All Working: A conjugate where the surd term comes first
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Worked Example: Squaring both sides safely when solving a surd equation
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Show All Working: Showing a set is not closed by a single counter-example
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Worked Example: Testing a*b against b*a for a given rule
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Show All Working: An operation that is associative but not commutative
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Worked Example: Testing whether star distributes over plus
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Worked Example: The law for multiplying powers of the same base
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Show All Working: Simplifying an expression that mixes the index types
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Show All Working: Deciding whether a given number is a term of a sequence
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Worked Example: Finding the common ratio of a geometric progression
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Worked Example: Adding or subtracting the same number on both sides
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Worked Example: Solving the equation modulus of x equals a
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