# Brackets

## Definition Of Brackets

Brackets can be defined as a pair of symbols used to group things together.

Brackets can be classified into four types based on their usage
Parentheses or round brackets, denoted by '( )', is generally used to define the different precedence of numbers in a mathematical expressionBox brackets or square brackets: Apart from mathematical expression, '[ ]' square brackets are also used to represent the numbers in interval
Curly brackets or braces, denoted by '{ }', are used to delimit sets
Angle brackets or chevrons, denoted by '<>', are used to enclose highlighted material to denote dialogue that is thought instead of spoken

### Examples of Brackets

a(x + y) = ax + ay
3ab2c(2a + 3ab - 5bc2 + 1)
= 3ab2c × 2a + 3ab2c × 3ab - 3ab2c × 5bc2 + 3ab2c × 1
= 16 + (4 × 7) − 4
= 16 + 28 - 4
= 44 - 4 = 40

A. 2
B. 3
C. 1
D. 4