1,222 prompts matching "Expanding and simplifying with negative brackets"
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Explain Back: Showing that AB and BA are usually different for 2 by 2 matrices
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Worked Example: A singular matrix, and why it has no inverse
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Explain Back: Solving a matrix equation containing both a sum and a product
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Worked Example: The units of mass, and the SI unit
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Worked Example: Marking the weight, the normal reaction and the friction on a diagram
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Practice: Limiting friction, and the greatest value it can reach
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Explain Back: The units of a moment, and why they are newton metres
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Explain Back: A probability distribution table for a discrete random variable
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Explain Back: Finding n and p from a given mean and variance
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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Practice: The components of a vector given its magnitude and direction
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Worked Example: The powers of i, and the cycle they follow
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Practice: Equating real and imaginary parts to find two unknowns
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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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Explain Back: Forming a quadratic equation with given complex roots
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Practice: Differentiating sin x and cos x
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Worked Example: Differentiating a bracket raised to a power
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Explain Back: The constant of integration, and why it appears
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Worked Example: The area between a curve and the x-axis
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