755 prompts matching "Learn: The sum of the roots as minus b over a"
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Common Mistakes: An indicial equation solved by substitution
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Final Revision: Checking an indicial solution by substitution
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Common Mistakes: Reading a logarithm from a table
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Show All Working: Solving a simple logarithmic equation
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Common Mistakes: A logarithmic equation that becomes a quadratic
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Common Mistakes: An arithmetic progression with a negative common difference
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Final Revision: Inserting an arithmetic mean between two numbers
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Final Revision: A savings problem modelled by an arithmetic progression
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Show All Working: A geometric progression with a fractional common ratio
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Common Mistakes: Inserting a geometric mean between two numbers
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Final Revision: A word problem that leads to a linear inequality
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Show All Working: Writing a quadratic solution set in interval form
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Final Revision: A word problem that leads to a quadratic inequality
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IGCSE Additional Maths Y10: A mapping diagram, and what it shows — Common Mistakes
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IGCSE Additional Maths Y10: Where a modulus graph meets a straight line — Common Mistakes
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IGCSE Additional Maths Y10: A line meeting a circle — Common Mistakes
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IGCSE Additional Maths Y10: Checking a polynomial division by multiplying back — Common Mistakes
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IGCSE Additional Maths Y10: Exponential decay in a real situation — Common Mistakes
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IGCSE Additional Maths Y10: How accurate a graphical solution really is — Common Mistakes
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Zero index rule
I am in SS 1. I'm going to explain the zero index rule, showing why any nonzero number rai