Which of following is a linear expression in one variable?

x + 5

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+ 3

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xy + z

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Solution

The correct option is A
x + 5

An algebraic expression which has only one variable and the highest power of the variable is 1 is termed as a linear expression in one variable. Only (x + 5=0) satisfies this condition.

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Question 9

In the following question out of the four options only one is correct, write the correct answer.

Which of the following is a linear expression?

(a) $x^{2} + 1$

(b) $y + y^{2}$

(d) 1 + z

{(x + y + z)}^{3} - x^{3} - y^{3} - z^{3}

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