1,044 prompts matching "Rationalising the denominator when it's a surd minus a surd"
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Explain Back: The zero product rule, and why it works
I have just studied the zero product rule, and why it works in my SS2 Further Mathematics
Common Mistakes: Writing down the roots once the brackets are found
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Worked Example: Halving the coefficient of x and squaring it
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Show All Working: Completing the square with a fractional coefficient of x
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Worked Example: Substituting a, b and c into the quadratic formula correctly
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Common Mistakes: A sign error in the formula, and how to catch it
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Final Revision: A word problem solved with the quadratic formula
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Worked Example: The identity linking alpha squared plus beta squared to the sum and product
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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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Practice: The condition for the line to be a tangent
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Explain Back: The condition for the line never to meet the curve
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Show All Working: The point of contact when a line touches a curve
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Common Mistakes: A line and a curve meeting once without the line being a tangent
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Worked Example: The division algorithm for polynomials
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Final Revision: Writing the result of a polynomial division out in full
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Worked Example: The remainder on dividing by x minus 3
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Practice: The remainder on dividing by 2x minus 1
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Practice: The conjunction of two propositions
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Explain Back: The disjunction of two propositions
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