1,334 prompts matching "Learn: What makes an expression in the roots symmetric"
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Explain Back: Finding an unknown coefficient given that a stated factor divides the polynomial
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Practice: Finding the third root of a cubic when two are known
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Spot My Mistake: The relations between roots and coefficients for a quartic
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Final Revision: Checking that the roots found satisfy the original equation
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Explain Back: Arrangements in which two particular objects must stay together
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Explain Back: The compound angle formula for tan of A plus B
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Learn: Solving sin x equals a given value between 0 and 360 degrees
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Common Mistakes: The angle between two lines found from their gradients
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Learn: The equation of a circle with its centre at the origin
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Common Mistakes: The condition for a line to be a tangent to a circle
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Learn: The parabola y squared equals 4ax, with its focus and directrix
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Explain Back: The eccentricity of an ellipse
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Learn: The range, and why it is a weak measure of spread
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Explain Back: The variance of an ungrouped set of data
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Learn: The velocity of one body relative to another
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Explain Back: The angle of friction, and the coefficient of friction
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Common Mistakes: The work done against friction on an incline
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Learn: Angular velocity, and how it relates to linear speed
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Learn: The defining equation of simple harmonic motion
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Common Mistakes: A particle oscillating on the end of an elastic string
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