Class IX & X Math(Algebraic Expressions)বীজগাণিতিক রাশি, অধ্যায় ৩য়

Class IX & X Math(Algebraic Expressions)বীজগাণিতিক রাশি, অধ্যায় ৩য়

Chapter 3 (Algebraic Expressions) Constant, Variables, Power, Base etc. Square Formula Use (a+b)^2=a^2+2ab+b^2,(a-b)^2=a^2-2ab+b^2,(a+b)^2-2ab=a^2+b^2,(a+b)^2+2ab=a^2+b^2,(a+b)^2-4ab=(a-b)^2, (a+b)^2-4ab=(a-b)^2, ab=((a+b)/2)^2-((a-b)/2)^2, 2(a^2+b^2)=(a+b)^2+(a-b)^2, 4ab=a+b)^2+(a-b)^2, (x+a)(x+b)+x^2+(a+b)x+ab, (a^2-b^2)=(a+b)(a-b)