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nika2105 [10]
3 years ago
7

If f(x) = 2x 2 + 3, find f(3). 31 15 21 39

Mathematics
2 answers:
Westkost [7]3 years ago
7 0
21 is the right answer goodluck
Mekhanik [1.2K]3 years ago
4 0

Answer: 21

Step-by-step explanation:

We are given a function f(x) = 2x^2 + 3

To find the value of f(3), we need to substitute x=3 in the given function, we get

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}]

Hence, the value of f(3) = 21.

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