The coefficient of a variable, unless otherwise specified, is assumed to be 1. variable have an "understood" coefficient of 1 because, for the variable to be listed, there must be at least one of it.
f(a) = 3a² + 8a + 5
substitute x = a into f(x)
f(a) = 3a² + 8a + 5
109 divided by 9 is 12. So the answer is 9.
Answer:
x-8
Step-by-step explanation: