1,045 prompts matching "Explain the triangle of forces method"
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Spot My Mistake: Finding a missing coefficient from a stated product of roots
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Learn: What makes an expression in the roots symmetric
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Worked Example: The identity linking alpha squared plus beta squared to the sum and product
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Common Mistakes: A symmetric function needing the sum and product twice over
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Worked Example: Substituting into the quadratic and tidying up
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Learn: Forming the quadratic that decides where a line meets a curve
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Worked Example: The discriminant used as the test for intersection
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Common Mistakes: A line and a curve meeting once without the line being a tangent
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Practice: Polynomial notation such as P of x
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Common Mistakes: Multiplying one polynomial by another
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Worked Example: The division algorithm for polynomials
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Explain Back: A division that leaves a constant remainder
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Worked Example: The remainder on dividing by x minus 3
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Common Mistakes: The remainder theorem applied to a quartic
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Practice: Showing that x plus 3 is a factor of a given polynomial
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Explain Back: Finding a coefficient so that a stated expression is a factor
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Common Mistakes: Using the factor theorem before dividing
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Explain Back: A polynomial with a repeated linear factor
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Explain Back: A cubic with a repeated root
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Common Mistakes: Comparing two statements by their truth tables
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