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Grade 9·13 problems·~15 min·Common Core Math - HS Functions·group·hsf-if-a-2

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Let $f(x) = x^2$ .

Compute $f(2) + f(3)$ and $f(2 + 3)$ . Which statement is true?

$f(2) + f(3) = f(2 + 3)$ , because functions distribute over addition.

$f(2) + f(3) = 13$ and $f(2 + 3) = 25$ , so they are not equal.

$f(2) + f(3) = f(2 + 3) = 25$

$f(2) + f(3) = f(2 + 3) = 13$