5x2

5x2 is a mathematical expression representing the product of 5 and 2. It is commonly read as "five by two" or "five times two." In base-10 arithmetic, 5 × 2 equals 10.

This fact can be understood as repeated addition: 5 + 5. The multiplication operation is commutative, so 5 × 2 = 2 × 5 = 10. The result is an even number and one of the first nontrivial products encountered when learning multiplication tables.

Geometrically, 5 by 2 can describe a rectangle with dimensions 5 units by 2 units, with area equal to length times width, 5 × 2 = 10 square units. The expression is also used to describe matrices with 5 rows and 2 columns, a 5×2 matrix, in linear algebra.

In mathematical notation, the "x" is a multiplier symbol; sometimes a dot or juxtaposition (5·2 or 5(2)) is used. The phrase "five by two" may be used to describe grids, arrays, or dimensions in various contexts.