1,325 prompts matching "use matrices to solve the simultaneous equations 2x+y=8 and x-y=1"
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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
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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WAEC Prep: The order in which the cofactors are transposed
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WAEC Prep: The adjoint as the transpose of the matrix of cofactors
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Quiz: Checking an inverse by multiplying to get the identity
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WAEC Prep: How long the inverse of a 3 by 3 matrix takes, and how to shorten it
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WAEC Prep: The newton, and how it is defined
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WAEC Prep: The component of a force at thirty degrees to the horizontal
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Spot My Mistake: Drawing the triangle of forces to scale to find an unknown force
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WAEC Prep: The two conditions for a rigid body to be in equilibrium
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Practice: Why the forces must sum to nought in two perpendicular directions
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Explain Back: Why the total moment about any point must be nought
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Worked Example: Drawing the polygon of forces to scale
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Explain Back: The units of a moment, and why they are newton metres
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WAEC Prep: The resultant moment of a couple and a force together
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WAEC Prep: The total moment of two forces about the same point
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Worked Example: The total moment of three parallel forces about one end
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Quiz: The point about which the total moment of a set of forces vanishes
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WAEC Prep: The triangle of forces and concurrence taken together
Act as my WAEC Further Mathematics coach. I am in SS 3. Take me through the triangle of fo