Introduction to Algebraic Expressions

An algebraic expression say 2 × x + y ÷ 2 – 3 cannot be evaluated to a definite number as values of x and y are unknown. x and y may be given any values and the resulting value of the expression would differ as a result.

The expression is written in a more compact form as

2x + y / 2 – 3

This expression has three algebraic terms. Terms of an algebraic expression are separated by + or – signs. 2x, y / 2 and 3 are the three terms in the given algebraic expression. 2 and x are factors of the term 2xy / 2 has factors 1 / 2 and y. Continue reading “Introduction to Algebraic Expressions”

Great Importance of Algebra Learning

Algebra is an extension of arithmetic. It handles unknown numbers along with known numbers. Unknown numbers are called variables. They are represented as alphabets such as a,b,x,y etc.

Mathematical statement 1 + 2 = 3  is true while  1 + 2 = 5 is false.

However, a statement like x + 1 = 3  is neither true nor false. x is a variable and may be given any value. The statement is true only for x = 2.
Continue reading “Great Importance of Algebra Learning”