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→Algebraic Identities
=Algebraic Identities=
=Algebraic Identities=
*<math>(a+b)(a-b)=a^2-b^2</math>
*<math>(a+b)^2=a^2+2ab+b^2</math>
*<math>(a-b)^2=a^2-2ab+b^2</math>
*<math>(x+a)(x+b)=x^2+x(a+b)+ab</math>
*<math>(x+a)(x+b)(x+c)=x^3+x^2(a+b+c)+x(ab+bc+ca)+abc</math>
*<math>(a+b)^3=a^3+3ab(a+b)+b^3</math>
*<math>(a-b)^3=a^3-3ab(a-b)-b^3</math>
*<math>a^3+b^3=(a+b)(a^2-ab+b^2)</math>
*<math>a^3-b^3=(a-b)(a^2+ab+b^2)</math>
*<math>(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca</math>
*<math>
*<math>
*<math>
*<math>
=Geometric Results=
=Geometric Results=
=Formulae for commercial arithmetic=
=Formulae for commercial arithmetic=