1,045 prompts matching "Quiz: An indicial equation that becomes a quadratic in a power"
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Explain Back: The zero product rule, and why it works
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Worked Example: Halving the coefficient of x and squaring it
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Explain Back: An answer left in surd form after completing the square
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Explain Back: Leaving the roots of a quadratic in surd form
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Spot My Mistake: What the formula gives when the discriminant is nought
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WAEC Prep: What the formula gives when the discriminant is negative
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WAEC Prep: Checking the sum and product against the solved 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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Final Revision: Using a symmetric function to find an unknown coefficient
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Explain Back: Writing the answers as ordered pairs
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Spot My Mistake: A pair with equal roots, meaning one solution only
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Worked Example: The discriminant used as the test for intersection
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Practice: The condition for the line to be a tangent
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Spot My Mistake: Finding the values of c for which a line is a tangent
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Final Revision: A word problem about a line and a parabola
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Worked Example: Testing a list of candidates to find a factor
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Explain Back: Finding a coefficient so that a stated expression is a factor
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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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