Answer: 21
Step-by-step explanation:
We are given a function [tex]f(x) = 2x^2 + 3[/tex]
To find the value of f(3), we need to substitute x=3 in the given function, we get
[tex]f(3) = 2(3)^2 + 3\\\\\Rightarrow\ f(3)=2(9)+3..............[\text{Since}\ 3^2=9]\\\\\Rightarrow\ f(x)=18+3..............[\text{Since}\ 2\times9=18]\\\\\Rightarrow\ f(x)=21..........[\text{Addition property}][/tex]
Hence, the value of f(3) = 21.
