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= a³-3a²b+3ab²- b³
☞ (a-b)³= a³-b³-3ab(a-b)
☞ a³+b³= (a+b) (a²-ab+b²)
☞ a³+b³= (a+b)³-3ab(a+b)
☞ a³-b³ = (a-b) (a²+ab+b²)
☞ a³-b³ = (a-b)³+3ab(a-b)
