Answer:
f(9) = 189
Step-by-step explanation:
Plug 9 into x
f(9) = 2(9)^2 + 3(9)
f(9) = 2(81) + 27
f(9) = 162 + 27
Thus, f(9) = 189
189
f(x) = 2x^2 + 3x , f(9)
= 2(81) + 27
= 162 + 27
= 189