755 prompts matching "Leaving the roots of a quadratic in surd form"
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Factorising a quadratic with a coefficient in front of x squared
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Worked Example: Why the square root of a non-square whole number is irrational
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Explain Back: Why 2 root 3 and 5 root 3 count as similar surds
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WAEC Prep: Ordering a list of surds by size
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Show All Working: Deciding whether two given surds are equal without a calculator
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Common Mistakes: Expressing root 50 as a multiple of root 2
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Learn: Why a surd is never left in the denominator
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Learn: The conjugate of a compound surd expression
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Show All Working: A conjugate where the surd term comes first
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Quiz: Checking a surd equation for extraneous roots
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Spot My Mistake: Solving a surd equation that leads to a quadratic
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Final Revision: Converting an answer back out of index form
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Learn: The change of base formula
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Quiz: The formula for the nth term of an arithmetic progression
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Learn: The formula for the sum of the first n terms of an arithmetic progression
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Common Mistakes: Proving the sum formula by pairing the terms
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Quiz: The formula for the nth term of a geometric progression
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Learn: The formula for the sum of the first n terms of a geometric progression
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Worked Example: Which form of the sum formula to use when r is less than one
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Final Revision: Proving the sum formula for a geometric progression
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