বীজগণিতের সুত্র সমূহ –> (a+b)²= a²+2ab+b² –> (a+b)²= (a-b)²+4ab –> (a-b)²= a²-2ab+b² –> (a-b)²= (a+b)²-4ab –> a² + b²= (a+b)²-2ab –> a² + b²= (a-b)²+2ab –> a²-b²= (a +b)(a -b) –> 2(a²+b²)= (a+b)²+(a-b)² –> 4ab = (a+b)²-(a-b)² –> ab = {(a+b)/2}²-{(a-b)/2}² –> (a+b+c)² = a²+b²+c²+2(ab+bc+ca) –> (a+b)³ = a³+3a²b+3ab²+b³ –> (a+b)³ = a³+b³+3ab(a+b) –> a-b)³=...