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Contents
Evaluation of Algebraic Expression
Rules of Algebra
Factorisation of Quadratic Polynomials
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Rules of
Algebra
Example:
 In
multiplication and division, the coefficient and the variable are multiplied or
divided.
Example:
 3 x 6a = 3 x 6 x
a = 18 x a = 18a 
In
simplifying algebraic
expressions, we also use the distributive law to help us to 'remove the
bracket'.
Example:
a(b + c) = a x
b + a x c = ab +ac
-2a(b - c) = -2ab
+ 2ac
(5s + 3t)4d = 5s x 4d + 3t x 4d =
20sf +12td
5e -(f + 6g)= 5e - f - 6g
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