Question

# Which of the following is a linear expression in one variable?

A

x+5=0

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B

x2+3=0

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C

x+5

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D

xy+5

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Solution

## The correct option is B x+5 An algebraic expression which has only one variable and the highest power of that variable is "one" is termed as a linear expression in one variable. Here, only (x+5) is a linear expression in one variable. (x+5=0) is a linear equation as it contains an 'equal to' symbol. It is not an algebraic expression. (x2+3=0) is an equation, the highest power of the variable is two. Hence, it is not a linear expression. (xy+5) is an algebraic expression but it is not a linear expression in one variable as it contains two variables.

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