1,045 prompts matching "Surd answers in area and perimeter questions"
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Explain Back: Leaving the roots of a quadratic in surd form
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Common Mistakes: A sign error in the formula, and how to catch it
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Practice: Forming an equation from a given sum and product
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Final Revision: One root twice the other, and what that gives
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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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Explain Back: Writing the answers as ordered pairs
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Common Mistakes: A word problem giving one linear and one quadratic equation
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Common Mistakes: A line and a curve meeting once without the line being a tangent
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Final Revision: A word problem about a line and a parabola
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Common Mistakes: The degree of the quotient and of the remainder
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Worked Example: Testing a list of candidates to find a factor
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Final Revision: A factor theorem question set in the WAEC style
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Worked Example: Factorising a cubic into a linear and a quadratic factor
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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: The exclusive sense of or, and its truth table
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Common Mistakes: Writing the converse, inverse and contrapositive of one statement
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Common Mistakes: Deciding between tautology, contradiction and contingency
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