1,334 prompts matching "An answer left in surd form after completing the square"
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Practice: The transpose of a 2 by 3 matrix
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Learn: Deciding whether a stated matrix calculation is possible at all
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Practice: Evaluating AB minus BA
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Practice: Turning a minor into a cofactor with the sign rule
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Explain Back: Writing out the full matrix of cofactors
I have just studied writing out the full matrix of cofactors in my SS3 Further Mathematics
Explain Back: Finding the adjoint of a 2 by 2 matrix quickly
I have just studied finding the adjoint of a 2 by 2 matrix quickly in my SS3 Further Mathe
Learn: The order of the steps in inverting a 3 by 3 matrix
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Explain Back: The inverse of a diagonal matrix
I have just studied the inverse of a diagonal matrix in my SS3 Further Mathematics class.
Practice: What a singular coefficient matrix says about the equations
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Practice: Comparing the inverse method with elimination for three equations
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Worked Example: Checking the solution of three equations by substitution
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Worked Example: The units of mass, and the SI unit
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Learn: Converting a weight given in kilogram-force into newtons
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Worked Example: The direction of the resultant of two forces
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Learn: The resultant of two perpendicular forces
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Practice: Choosing the most convenient pair of directions to resolve along
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Practice: The direction of the resultant of several coplanar forces
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Explain Back: Showing that a system of concurrent forces is in equilibrium
I have just studied showing that a system of concurrent forces is in equilibrium in my SS3
Learn: A space diagram and a force diagram drawn side by side
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Practice: Why the forces must sum to nought in two perpendicular directions
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