${(x+y)}^3$ $\,=\,$ $x^3+y^3+3xy(x+y)$

$x+y$ is a binomial in which $x$ and $y$ are two terms. In mathematics, the cube of sum of two terms is expressed as the cube of binomial $x+y$. It is read as $x$ plus $y$ whole cube. It is mainly used in mathematics as a formula for expanding cube of sum of any two terms in their terms.

${(x+y)}^3$ $\,=\,$ $x^3+y^3+3x^2y+3xy^2$

The cube of $x$ plus $y$ identity can be proved in two different mathematical approaches.

Learn how to derive the expansion of cube of $x$ plus $y$ identity by the product of three same addition basis binomials.

Learn how to derive the expansion of $x$ plus $y$ whole cube identity geometrically on the basis of volume of a cube.

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