Final answer:
To find f(a), f(a+h), and the difference quotient f(a+h) − f(a)/h, substitute the given values into the function and perform the necessary calculations.
Step-by-step explanation:
To find f(a), substitute a into the function f(x) = 5 - 3x + 7x².
To find f(a + h), substitute (a + h) into the function f(x) = 5 - 3x + 7x².
To find the difference quotient f(a + h) - f(a)/h, subtract f(a) from f(a + h) and then divide by h.