Question

identify the coefficient of ( x^3 ) in ( 7x^3 - 2x^2 + 5x - 9 ).
a. -2
b. 7
c. -9
d. 5

Explanation:

Step1: Define polynomial coefficient

A coefficient is the numerical factor multiplied by a variable term.

Step2: Locate $x^3$ term

In $7x^3 - 2x^2 + 5x - 9$, the $x^3$ term is $7x^3$.

Step3: Extract the coefficient

The numerical factor of $7x^3$ is 7.

Answer:

b. 7