582 prompts matching "A three-dimensional vector parallel to another"
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Spot My Mistake: The decimal expansion of an irrational number, and why it never repeats
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Learn: What makes two surds similar
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Worked Example: What makes two surds equal
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Practice: Collecting similar surds in an expression
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
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Common Mistakes: Expressing root 50 as a multiple of root 2
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Practice: Multiplying a whole number by a surd
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Explain Back: Multiplying root a by root b
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Common Mistakes: Expanding the product of two surd brackets
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Learn: The conjugate of a compound surd expression
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Worked Example: Why multiplying by the conjugate clears the surd
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Learn: Solving an equation with a single square root term
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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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Explain Back: Solving an equation where the surd must be isolated first
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Common Mistakes: A surd equation that has no real solution
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Learn: What a binary operation actually is
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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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