A composite number is a number that can be written as a product of two positive integers other than 1 and the number itself.and also a composite expression also can be written as two more expression.
For example, x2+3x+2 can be written as a product of (x+1)(x+2)
Factor
To factor a number means to break it up into numbers that can be multiplied together to get the original number.
EXAMPLES:
6 = 3 x 2 so, factors of 6 are 3 and 2
9 = 3 x 3 so, factors of 9 are 3 and 3
Sometimes, numbers can be factored into different combinations.
EXAMPLE,
8 = 4 x 2 = 2 x 2 x 2
18 = 9 x 2 = 6 x 3 = 3 x 2 x 3
OR
Mathematics . to express (a mathematical quantity) as a product of two or more quantities of like.
x 2 − y 2 = ( x + y ) ( x − y ).