Wednesday, 22 April 2026

MATHEMATICS FORMULAS


(1)(a+b)²=a²+2ab+b²

(2)(a-b)²=a²-2ab+b²

(3)a²-b²=(a+b)(a-b)

(4)(a+b)³=a³+b³+3ab(a+b)

(5)(a-b)³=a³-b³-3ab(a-b)

(6)Sum of first n natural numbers=n(n+1)/2

(7)(a+b+c)²=a²+b²+c²+2ab+2bc+2ca

(8)Area of Circle

A=πr²

(9) Circumference of Circle C=2πr

(10) Pythagoras Theorem 

c²    =   a²     +      b²

(Hypotenuse)²=(Base)²+(Altitude)²

(11)Profit=Selling Price-Cost Price 

Profit=S.P-C.P

(12) Profit percentage=

Profit/cost price ×100







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