Question

coefficient in the following expression?
$5a^2 - 7$
options: 7, 5, a

Explanation:

Step1: Recall the definition of a coefficient

A coefficient is the numerical factor of a term that contains a variable.

Step2: Analyze the expression \(5a^{2}-7\)

The expression has two terms: \(5a^{2}\) and \(- 7\). For the term \(5a^{2}\), the variable part is \(a^{2}\) and the numerical factor (coefficient) is \(5\). The term \(-7\) is a constant term (no variable), so it does not have a coefficient related to a variable in the same way.

Answer:

5