1,333 prompts matching "Why a rational number added to an irrational one stays irrational"
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Final Revision: Solving a disguised quadratic by substitution
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Quiz: Finding alpha cubed plus beta cubed
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Worked Example: Evaluating a polynomial by substitution
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Learn: The sum of the roots of a cubic read from its coefficients
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Worked Example: The sum of the products of the roots of a cubic taken two at a time
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Quiz: The product of the roots of a cubic
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Final Revision: Checking that the roots found satisfy the original equation
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Worked Example: Solving a quadratic inequality by sketching the parabola
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Quiz: Solving a quadratic inequality using a sign table
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Quiz: Choosing a committee of r people from n
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Final Revision: Losing solutions by dividing through by cos x
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Spot My Mistake: The effect of c in y equals sin x plus c
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Quiz: The gradient of the line through two points
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Spot My Mistake: The general form ax plus by plus c equals nought
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Learn: The equation of a circle with its centre at the origin
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Final Revision: The equation of the circle through three given points
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Worked Example: The parametric form of a point on a parabola
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Final Revision: The focus-directrix definition shared by all the conics
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Final Revision: Reading the quartiles off a cumulative frequency curve
Act as my WAEC Further Mathematics coach in the last week before the paper. I am in SS 3.