1,326 prompts matching "Rationalising the denominator when it's a surd minus a surd"
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Learn: The union of two sets written in set-builder notation
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Practice: The difference of two sets, A minus B
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Explain Back: Finding the identity element of a binary operation
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Common Mistakes: Solving an equation in which the unknown sits under a root
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Explain Back: The laws of logarithms for a product and for a quotient
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WAEC Prep: The change of base formula for logarithms
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Show All Working: Solving a logarithmic equation and rejecting the invalid root
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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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Practice: The condition for a quadratic equation to have equal roots
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Practice: Finding alpha minus beta from the sum and the product
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Learn: The degree of a polynomial and its leading coefficient
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Final Revision: The zeros of a polynomial and where its graph cuts the x-axis
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Learn: The sum of the roots of a cubic read from its coefficients
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Practice: Finding the third root of a cubic when two are known
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Learn: Solving a linear inequality, and reversing the sign on dividing by a negative
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Worked Example: Solving a quadratic inequality by sketching the parabola
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Common Mistakes: The range of values of x for which an expression stays positive
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Final Revision: The region of the plane satisfying a set of linear inequalities
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Learn: The meaning of n factorial, and how to evaluate it
You are my personal SS3 Further Mathematics tutor. Teach me the meaning of n factorial, an