233 prompts matching "Simplifying a surd expression before squaring"
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Quiz: Expanding a 3 by 3 determinant along a row or column containing noughts
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Learn: Solving two simultaneous equations by Cramer's rule
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Learn: Swapping and negating the entries when inverting a 2 by 2 matrix
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Quiz: Checking an inverse by multiplying to get the identity
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Learn: The order of the steps in inverting a 3 by 3 matrix
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Quiz: Checking a 3 by 3 inverse by multiplication
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Quiz: Solving three simultaneous equations with the inverse matrix
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Learn: Inertia, and what mass actually measures
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Quiz: Why mass stays the same wherever the body is taken
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Learn: Converting a weight given in kilogram-force into newtons
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Learn: The resultant of two perpendicular forces
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Learn: The component of a force along a stated direction
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Quiz: Recovering the original force from its two components
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Quiz: The magnitude of the resultant of several coplanar forces
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Learn: A space diagram and a force diagram drawn side by side
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Learn: Choosing the point about which to take moments
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Learn: What an unclosed polygon of forces tells you
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Quiz: The coefficient of friction between two surfaces
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Learn: The algebraic sum of moments when the senses differ
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Quiz: The point about which the total moment of a set of forces vanishes
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