722 prompts matching "Checking a completed square by expanding it again"
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Rationalising a denominator with three surd terms
I am in SS 1. I'm going to explain rationalising a more unusual denominator involving more
Complement of a set within a universal set
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Finite and infinite sets
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Empty set and its notation
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A three-region overlap problem with unknowns
I am in SS 1. Quiz me with 4 short Additional Maths questions on a Venn diagram word probl
Common mistakes with set notation
Quiz me with 4 short Additional Maths questions on the most common set notation mistakes S
Finding the nth term of an arithmetic sequence
I am in SS 1. I'm going to explain finding the nth term formula of an arithmetic sequence,
Sum of the first n terms of an arithmetic series
I am in SS 1. I attempted an Additional Maths question on using the formula Sn = n/2 (2a +
Applying the sum to infinity formula when the ratio lies between minus one and one
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Arithmetic mean between two numbers
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Solving for x when three terms are in arithmetic progression
I am in SS 1. I attempted an Additional Maths question on finding the value of x given tha
Recurring decimals as an infinite geometric series
I am in SS 1. I'm going to explain how a recurring decimal, such as 0.777..., can be writt
Comparing arithmetic and geometric growth over time
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Series exam question with show all working
I am in SS 1. I'm going to explain a full Cambridge/Additional Maths style series question
Common student mistakes with progression formulas
I'm going to explain the most common mistakes SS1 students make when applying the AP and G
Multi-part progression problem with an unknown first term
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Explaining why sum to infinity only works for |r| < 1
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Condition for two lines to be perpendicular
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Equation of a line with a given y-intercept and passing through a point
I am in SS 1. I attempted an Additional Maths question on finding the equation of a straig
Coordinate geometry combined with simultaneous equations
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