1,332 prompts matching "Solving an equation where the surd must be isolated first"
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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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Practice: Choosing a committee that must contain one particular person
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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Common Mistakes: Expressing a cos x plus b sin x in the form R cos of x minus alpha
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Final Revision: Proving an identity by working on one side only
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Spot My Mistake: The effect of c in y equals sin x plus c
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Worked Example: The midpoint formula applied to a given segment
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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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WAEC Prep: Proving two given lines parallel from their gradients
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Show All Working: Proving two given lines perpendicular from their gradients
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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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Common Mistakes: The coefficient of variation, for comparing two sets
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Final Revision: Reading the quartiles off a cumulative frequency curve
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Quiz: The principle of moments for a body in equilibrium
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Practice: A uniform beam resting on two supports
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Show All Working: Replacing two parallel forces by a single resultant
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