Value of an Expression

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Let Us Learn About Value of an Expression.

Expression:

An algebraic expression is a collection of one or more terms, which are separated by the signs + (plus) or/ and – (minus).

Value of an Expression:

The value of an expression is the numerical result when an integer is substituted in the variables of a given expression and simplified. It may be a multi-valued expression in which different variables are given different values and simplified.

In simple words, the value of an expression depends on the value of its variable(s)

Example:

If p = 8, q =1, r = 2, find the value of :

10pq – 3qr

4pqr – 2p

Solution:

Given, 10pq – 3qr p= 8, q=1, r=2

4pqr – 2p

Numerator: 10 pq – 3 qr (substituting the values of p, q, r)

= 10 x 8 x 1 – 3 x 1 x 2

= 80 – 6

= 74

Denominator: 4pqr – 2p (substituting the values of p, q, r)

= 4 x 8 x 2 – 2 x 8

= 64 – 16

= 48

Numerator = 74

Denominator 48

= 37

24 Answer

I hope the above explanation was useful.

Keep reading and leave your comments. In our next blog we shall learn about identifying angles.