1,111 prompts matching "Factorising a quadratic whose leading coefficient is not one"
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Practice: The condition on the orders for a product to exist
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WAEC Prep: When Cramer's rule is quicker than elimination
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Spot My Mistake: Forming the determinant Dx by replacing the first column
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Spot My Mistake: Checking a Cramer's rule solution by substituting back
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Spot My Mistake: Checking cofactors by expanding the determinant along a second row
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Spot My Mistake: Finding the adjoint of a 3 by 3 matrix
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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Spot My Mistake: Why the inverse must be applied on the correct side
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Practice: What a singular coefficient matrix says about the equations
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WAEC Prep: A three-unknown system arising from a word problem
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WAEC Prep: When the matrix method is worth the work for three unknowns
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WAEC Prep: The newton, and how it is defined
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Spot My Mistake: The greatest and the least resultant of two given forces
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Quiz: Recovering the original force from its two components
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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: Why friction is called a self-adjusting force
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WAEC Prep: Calculating a moment as force times perpendicular distance
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Worked Example: The total moment of three parallel forces about one end
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Spot My Mistake: Using concurrence to find the direction of an unknown third force
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