1,332 prompts matching "Teach me how to simplify surds"
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Quiz: The complement of a set within a stated universal set
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Explain Back: The symmetric difference of two sets
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Spot My Mistake: De Morgan's law that the complement of a union is the intersection of the complements
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WAEC Prep: The number of elements in the union of two sets
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Show All Working: A three-set Venn diagram drawn from a subject survey
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Common Mistakes: Showing that intersection distributes over union
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Explain Back: Finding the identity element of a binary operation
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Spot My Mistake: Finding the inverse of an element under a binary operation
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Show All Working: Solving an equation written in terms of a binary operation
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Common Mistakes: A binary operation defined by arithmetic modulo n
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Explain Back: Rationalising a denominator of the form a plus root b using the conjugate
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Show All Working: Expressing a number in the form a root b
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Show All Working: Solving a logarithmic equation and rejecting the invalid root
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Worked Example: The discriminant, and what each of its three cases means
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Show All Working: Solving a quadratic by completing the square
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Show All Working: Finding a coefficient given a stated relation between the roots
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Common Mistakes: Symmetric functions when the three roots of a cubic are involved
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Final Revision: Checking a symmetric-function answer by solving the equation outright
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Quiz: The factor theorem, and testing whether x minus a is a factor
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Explain Back: Finding an unknown coefficient given that a stated factor divides the polynomial
I have just studied finding an unknown coefficient given that a stated factor divides the