1,045 prompts matching "The line of best fit, and the regression line"
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Common Mistakes: Checking a completed square by expanding it again
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Final Revision: Why completing the square always works
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Learn: Deriving the quadratic formula by completing the square
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Final Revision: A word problem solved with the quadratic formula
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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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Practice: Polynomial notation such as P of x
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Common Mistakes: Multiplying one polynomial by another
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Spot My Mistake: A division that leaves a linear remainder
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Common Mistakes: The remainder theorem applied to a quartic
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Final Revision: A word problem that uses the remainder theorem
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Practice: Showing that x plus 3 is a factor of a given polynomial
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Common Mistakes: Using the factor theorem before dividing
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Final Revision: A factor theorem question set in the WAEC style
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Common Mistakes: Factorising fully, and knowing when to stop
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Final Revision: Checking a factorisation by expanding it again
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Final Revision: Checking a root of a cubic by substitution
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Common Mistakes: Comparing two statements by their truth tables
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Learn: The conditional statement, if p then q
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Common Mistakes: Simplifying a compound statement using the laws
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