How many terms are in the expression shown below?

a2 - ab + 8b + b2 - 1

2

3

4

5

A² - ab + 8b + b² - 1

There are 5 terms in the expression.

a² = 1st term

ab = 2nd term

8b = 3rd term

b² = 4th term

1 = 5th term

Each term is separated by a plus (+) sign or a minus (-) sign.

A term is either a number, a variable, or a number and a variable multiplied together.

a², ab, b² are variables.

8b is a number and a variable multiplied together

1 is a number.