1,332 prompts matching "Explain sum and product of roots back to me"
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WAEC Prep: Evaluating A squared minus 2A
Act as my WAEC Further Mathematics coach. I am in SS 3. Take me through evaluating A squar
Practice: Evaluating AB minus BA
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Quiz: Finding an unknown entry from a stated matrix equation
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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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Worked Example: Forming the determinant Dy by replacing the second column
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Learn: Solving two simultaneous equations by Cramer's rule
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WAEC Prep: What Cramer's rule gives when the system is inconsistent
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Worked Example: The identity that A times its adjoint gives the determinant times the identity
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Practice: Why a 2 by 2 matrix with determinant nought cannot be inverted
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WAEC Prep: Checking the determinant before attempting a 3 by 3 inverse
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Quiz: Checking a 3 by 3 inverse by multiplication
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WAEC Prep: Simultaneous equations with fractional coefficients solved by matrix
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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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Quiz: Solving three simultaneous equations with the inverse matrix
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Practice: Comparing the inverse method with elimination for three equations
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Quiz: Why mass stays the same wherever the body is taken
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