1,045 prompts matching "The determinant of a 2 by 2 matrix as ad minus bc"
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Explain Back: An answer left in surd form after completing the square
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Spot My Mistake: Completing the square when the roots are not real
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Practice: Giving the roots correct to two decimal places
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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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Quiz: Finding the sum and the product without solving the equation
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WAEC Prep: Checking the sum and product against the solved roots
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Worked Example: The identity linking alpha squared plus beta squared to the sum and product
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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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Worked Example: The division algorithm for polynomials
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Explain Back: Finding a coefficient when the remainder is given
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WAEC Prep: The remainder theorem checked against long division
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Quiz: Which values are worth testing as factors
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Spot My Mistake: The factor theorem applied to a quartic
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Worked Example: How many roots a cubic equation has
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Spot My Mistake: Finding the remaining roots once one is known
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WAEC Prep: The relation between the roots and the constant term
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WAEC Prep: The symbols used for and, or and not
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Quiz: Disjunction and the inclusive or
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