1,045 prompts matching "The effect on the standard deviation of adding a constant to every value"
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Worked Example: Substituting a, b and c into the quadratic formula correctly
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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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Practice: Forming an equation from a given sum and product
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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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WAEC Prep: Forming an equation whose roots are alpha plus one and beta plus one
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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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Spot My Mistake: A pair with equal roots, meaning one solution only
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WAEC Prep: A pair that gives no real solution at all
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WAEC Prep: Expressions that are not polynomials, and why not
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Practice: A division that leaves no remainder
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Spot My Mistake: A division that leaves a linear remainder
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Explain Back: Finding a coefficient when the remainder is given
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Spot My Mistake: Finding two coefficients from two remainder conditions
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Explain Back: Finding a coefficient so that a stated expression is a factor
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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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