755 prompts matching "What the formula gives when the discriminant is negative"
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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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Practice: A binary operation set out as a table
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Show All Working: Evaluating a repeated operation such as a*(b*c)
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Practice: Testing a set for closure under multiplication
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Quiz: Reading commutativity off a symmetrical operation table
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Practice: Why an identity element must work from both sides
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Show All Working: Simplifying an expression with letters and indices
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Practice: A fractional index with numerator one, read as a root
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Explain Back: A fractional index with a numerator above one
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Quiz: An indicial equation that becomes a quadratic in a power
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Show All Working: A word problem that leads to an indicial equation
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Quiz: Writing a logarithm as an index statement
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Practice: Evaluating log to base 2 of 8
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Practice: Combining two logarithms into one
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Explain Back: Splitting a single logarithm into several
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Show All Working: Solving a simple logarithmic equation
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Quiz: Evaluating log to base 3 of 7 by change of base
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Explain Back: A logarithmic equation written in two different bases
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Show All Working: A geometric progression with a fractional common ratio
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