755 prompts matching "Teach me what a complex number is"
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Worked Example: Why multiplying by the conjugate clears the surd
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Worked Example: Squaring both sides safely when solving a surd equation
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Quiz: Checking a surd equation for extraneous roots
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Practice: Solving an equation with a surd on each side
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Worked Example: Reading the symbol used for a binary operation
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Quiz: Evaluating a*b from a given rule
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Practice: A binary operation set out as a table
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Practice: Testing a set for closure under multiplication
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Worked Example: Testing a*b against b*a for a given rule
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Worked Example: Rewriting a negative index as a fraction
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Quiz: A negative index on a fraction, and turning it upside down
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Practice: Solving 2 to the power x equals 32
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Practice: Evaluating log to base 2 of 8
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Worked Example: The law for the logarithm of a quotient
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Quiz: The law for the logarithm of a power
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Practice: Combining two logarithms into one
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Worked Example: Converting a logarithm to base ten so that tables can be used
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Quiz: Evaluating log to base 3 of 7 by change of base
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Practice: The relation between log a of b and log b of a
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Worked Example: Writing out the terms of a sequence from its nth term
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