878 prompts matching "Checking a root of a cubic by substitution"
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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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Final Revision: The power set, and how many subsets a set of n elements has
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Learn: Reading a binary operation defined by a formula such as a*b = a + b - ab
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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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Learn: Simplifying a surd by extracting the largest perfect square
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WAEC Prep: Comparing the sizes of two surds without a calculator
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Learn: The multiplication and division laws of indices used together
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Quiz: Solving an index equation by writing both sides to the same base
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Explain Back: The laws of logarithms for a product and for a quotient
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Spot My Mistake: The power law of logarithms
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WAEC Prep: The change of base formula for logarithms
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Final Revision: Sketching the graph of a logarithmic function
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Worked Example: The discriminant, and what each of its three cases means
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Quiz: Forming a quadratic equation whose roots are given
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Practice: The condition for a quadratic equation to have equal roots
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WAEC Prep: Forming an equation whose roots are each two more than the original
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Spot My Mistake: Forming an equation whose roots are alpha squared and beta squared
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WAEC Prep: Forming an equation whose roots are alpha over beta and beta over alpha
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