1,328 prompts matching "Practice: A cubic with one real root and two complex ones"
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Show All Working: Solving a quadratic by completing the square
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Worked Example: Evaluating a polynomial by substitution
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Worked Example: Solving a quadratic inequality by sketching the parabola
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Show All Working: Solving a pair of simultaneous linear inequalities
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Common Mistakes: The range of values of x for which an expression stays positive
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Worked Example: The number of arrangements of n different objects in a row
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Show All Working: Arrangements of the letters of a given word
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Common Mistakes: Arrangements restricted at the first or the last place
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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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Show All Working: Solving a cos x plus b sin x equals c by the R method
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Common Mistakes: Giving the general solution of a trigonometric equation
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Show All Working: Reading the solutions of a trigonometric equation off a graph
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Worked Example: The midpoint formula applied to a given segment
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Common Mistakes: The condition for a line to be a tangent to a circle
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Worked Example: The parametric form of a point on a parabola
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Show All Working: The rectangular hyperbola xy equals c squared
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Common Mistakes: Identifying a conic from a general second-degree equation
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Worked Example: The interquartile range of a set of ordered data
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Common Mistakes: The centre of gravity of a uniform lamina
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Common Mistakes: What becomes of the tension when the string goes slack
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