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BASIC MATHEMATICS FOR PSC EXAMINATIONS

Some Important Maths Equations


1.  a(b+c) = ab + ac
2.  (a+b)2 = a2 + 2ab + b2
3.  (a-b)2 = a2-2ab + b2
4.  (a+b)2 = (a-b)2 + 4ab
5.  (a-b)2 = (a+b)2 - 4ab
6.  (a-b) (a+b) = a2 - b2
7.  (a+b)3 = a3 + 3ab(a+b) + b3
8.  (a-b)3 = a3 - 3ab(a-b) - b3
9.  a3 + b 3 = (a+b) (a2 - ab + b2)
10.  a3 - b 3 = (a-b) (a2 + ab + b2)
11.  (a3 - b3) / (a2 + ab + b2) = a-b
12.  (a3 + b3) / (a2 - ab + b2) = a+b




 Key Words : Nobel Prize 2014, Kerala PSC, Secretariat Assistant
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