1,045 prompts matching "Learn: The sum of the roots of a cubic read from its coefficients"
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Solve 2x^2 + 7x + 3 = 0 by factorisation
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Solve x^2 - 3x - 10 = 0 by factorisation
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Solve 3x^2 - 5x - 2 = 0 by factorisation
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Solve x^2 - 6x + 9 = 0 by factorisation
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Solve 2x^2 - 11x + 5 = 0 by factorisation
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Solve x^2 + x - 12 = 0 by factorisation
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Worked example: solving x^3-6x^2+11x-6=0
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Worked example: subtracting two polynomials
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Divide a polynomial by a quadratic
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Spot my mistake testing an argument
Act as my SS2 Further Maths tutor. I tested a logical argument for validity using a truth
Worked example: choosing a committee
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Worked example: proving a trigonometric identity
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Teach me arithmetic progressions
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Teach me geometric progressions
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Worked example: finding a term in an arithmetic progression
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Spot my mistake in a geometric progression
Act as my SS2 Further Maths tutor. I calculated the sum of the first eight terms of a geom
Teach me what a complex number is
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Worked example: plotting a complex number on an Argand diagram
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Spot my mistake finding a vector's magnitude
Act as my SS2 Further Maths tutor. I calculated the magnitude of a vector but I think I ma
Spot my mistake calculating standard deviation
Act as my SS2 Further Maths tutor. I calculated the standard deviation of a data set but I