333 prompts matching "Solve x^2 - 7x + 12 = 0 by factorisation"
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WAEC Prep: The inverse of a 3 by 3 matrix from its adjoint and its determinant
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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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Explain Back: Solving two simultaneous equations by multiplying by the inverse
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Worked Example: Checking the solution of three equations by substitution
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Practice: Choosing the most convenient pair of directions to resolve along
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WAEC Prep: The forces on a body suspended by a single string
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Learn: A space diagram and a force diagram drawn side by side
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WAEC Prep: A rigid body held in equilibrium by four forces
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WAEC Prep: A knot held in equilibrium by three strings
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Learn: Finding two unknown forces by Lami's theorem
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Explain Back: Testing whether data are Poisson by comparing mean and variance
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WAEC Prep: Comparing two values from different normal distributions by z-score
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Worked Example: Finding a value from a given probability by working backwards
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WAEC Prep: The probability that a normal variable exceeds the mean by more than one standard deviation
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WAEC Prep: The magnitude of a vector after multiplication by a scalar
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WAEC Prep: The dot product used to find the work done by a force
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WAEC Prep: Multiplying a complex number by a real number
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WAEC Prep: Dividing by a purely imaginary number
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Spot My Mistake: Dividing one complex number by another using the conjugate
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