What is algebra and why do we use it?

Algebra is a part of mathematics in which letters or symbols are used to represent either a known constant or an unknown value. Algebra is often used within formulae in which we can extrapolate an answer, an example being the 'Quadratic Equation'.

Related Maths GCSE answers

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A is the point with coordinates (5, 9). B is the point with coordinates (d, 15). The gradient of the line AB is 3. Work out the value of d.


There is a quarter circle with radius 8cm, what is the area of the quarter circle. The answer should be given in terms of pi, units are cm^2.


If a shop sells a bucket at £16 after a 15% discount, how much would the bucket have been before the discount?


Describe and explain the change in the shape of the graph y=x^2 and y=x^2 + 2.