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Which expression has two variables?
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Answer and explanation
Correct answer: ab + 2
In the expression ab + 2, a and b are two distinct variables, so option D is correct. The expressions 9x + 2 and m² + 3 each have only one variable, while 7 is a constant. Exam tip: Count the distinct letters in an expression to identify the number of variables.
Frequently asked questions
What is the correct answer to this question?
ab + 2
Why is this the correct answer?
In the expression ab + 2, a and b are two distinct variables, so option D is correct. The expressions 9x + 2 and m² + 3 each have only one variable, while 7 is a constant. Exam tip: Count the distinct letters in an expression to identify the number of variables.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Introduction to Polynomials. Topic: Algebraic expressions.
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