Answer:
22
Step-by-step explanation:
SImply replace x with 3.
f(3)=2x^2 + 4
=2(3)^2 + 4, (RE: PEMDAS, so first solve the exponent: 3^2)
=2(9) + 4 (Multiply 9 and 2)
=18 + 4 (Add)
=22
