Which of the following expressions is not a binomial?

A) b^2-4ac

B) ax^2+bx

C) a^2b^2

D) a^2-b^2

Is it C?

yes

Awesome thank you!!

To identify which of the expressions is not a binomial, we need to understand what a binomial expression is.

A binomial expression consists of two terms that are connected by either addition or subtraction. Therefore, we need to analyze each expression to see if it satisfies this criterion:

A) b^2 - 4ac:
This expression consists of two terms, b^2 and -4ac, connected by subtraction. Therefore, it is a binomial expression.

B) ax^2 + bx:
This expression consists of two terms, ax^2 and bx, connected by addition. Therefore, it is a binomial expression.

C) a^2b^2:
This expression consists of one term, a^2b^2. It does not have two terms connected by either addition or subtraction. Therefore, it is not a binomial expression.

D) a^2 - b^2:
This expression consists of two terms, a^2 and -b^2, connected by subtraction. Therefore, it is a binomial expression.

Based on this analysis, you are correct. Option C) a^2b^2 is not a binomial expression since it only has one term.