Basic Definitions

Chapter 8 Class 8 Algebraic Expressions and Identities
Concept wise

Expression does not have an = sign

Β  9 β 8 is an expression

Β  2x + 3 is an expression

Β  3x β 9 is an expression

Β  4x = 10 is not an expression

Β

Β 4x = 10 has an = Sign

So, it is not an expression

It is an equation

Β

Here,

Β  9 β 8 is an expression

But it does not have a variable

So, it is an expression without variables

Β

But here,

Β Β Β Β Β Β  we will study expressions with variables

Β

Let learn how expressions are formed

We can also

Β  Β Β Β  Form expressions from statements

Β

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### Transcript

π₯ + 3 π₯ + 3 z β 2 2 subtracted from z 2 β z z subtracted from 2 4 l 4 multiplied by l π/8 b divided by 8 β9p 9 multiplied by P 4π₯ β 9 First π₯ is multiplied by 4 Then 9 is subtracted from Product π¦/3+10 Y is divided by 3 and then 10 is added to it. 4 Subtracted from π₯ : π₯ - 4 9 added to z : 9 + z t multiplied by 7 : 7t k divided by 2 : π/2 9 multiplied by c : β 9π 9 multiplied by 6 and 6g + 11 then 11 is added to the product P is divided by 8 and π/8 β7 then 7 is subtracted from it.