1,334 prompts matching "Expressing a rationalised answer in the form a root b over c"
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Worked Example: Finding one over alpha plus one over beta
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Quiz: The factor theorem, and testing whether x minus a is a factor
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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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Common Mistakes: Three roots in geometric progression in a cubic
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Spot My Mistake: Showing the solution of an inequality on a number line
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Show All Working: Arrangements of the letters of a given word
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Spot My Mistake: The identity that n choose r equals n choose n minus r
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WAEC Prep: Pascal's triangle and the combination numbers in it
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Show All Working: Counting the handshakes, or the lines joining n points
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Quiz: Solving tan x equals a given value, and the period of the tangent
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Show All Working: Solving a cos x plus b sin x equals c by the R method
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Spot My Mistake: The effect of c in y equals sin x plus c
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Show All Working: Reading the solutions of a trigonometric equation off a graph
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Quiz: The gradient of the line through two points
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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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Quiz: Finding the centre and the radius from the general equation
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Spot My Mistake: The equation of the tangent to a circle at a point on it
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WAEC Prep: The length of the tangent from an external point
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