1,154 prompts matching "Checking a factorisation by expanding it again"
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Quiz: The product of a complex number and its conjugate
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Practice: The sum of a complex number and its conjugate
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Practice: The addition of complex numbers shown on an Argand diagram
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WAEC Prep: The polar form written as r cos theta plus i r sin theta
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Quiz: Writing a complex number in polar form
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WAEC Prep: De Moivre's theorem used with a negative index
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Learn: The cube roots of unity
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Explain Back: Forming a quadratic equation with given complex roots
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WAEC Prep: Why the limit is taken as h tends to nought
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WAEC Prep: The definition of the derivative as a limit
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WAEC Prep: Differentiating a polynomial with a fractional index
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WAEC Prep: The indefinite integral, and its notation
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Explain Back: The constant of integration, and why it appears
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WAEC Prep: A definite integral evaluated with the limits reversed
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WAEC Prep: Evaluating a definite integral between two limits
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Learn: An area lying below the x-axis, and its sign
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WAEC Prep: The starting velocity recovered as a constant of integration
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Quiz: Using the initial conditions to fix the constants in a kinematics problem
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Quiz: A rate of change problem about a vessel filling with water
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Practice: The sign convention for displacement, velocity and acceleration
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