Given:
The product of 6 and the square of a number plus 15.
Required:
To write an expression by using the given information.
Step-by-step explanation:
Let the number be x.
The square of this number =

The expression represents the product of 6 and the square of a number plus 15.
Thus the expression becomes:

We know that the coefficient is the number that is multiplied by the variable.
So the coefficient of

is 6.
Final Answer:
The expression is:

Coefficient = 6