755 prompts matching "use matrices to solve the simultaneous equations 2x+y=8 and x-y=1"
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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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WAEC Prep: Ordering a list of surds by size
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Common Mistakes: Expressing root 50 as a multiple of root 2
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Final Revision: Surds that cannot be combined at all
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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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WAEC Prep: Squaring a single surd
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Final Revision: Checking a conjugate answer by multiplying back
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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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Spot My Mistake: A binary operation defined on a set of three elements
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WAEC Prep: Writing a binary operation rule from a description in words
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Common Mistakes: A binary operation that is ordinary addition in disguise
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Practice: Testing a set for closure under multiplication
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Spot My Mistake: Reading closure off an operation table
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Common Mistakes: Closure on a set of three elements under a stated rule
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Worked Example: Testing a*b against b*a for a given rule
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Quiz: Reading commutativity off a symmetrical operation table
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