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# Solving a Function: Altering the $x$ Value

ACTMAT-X0LNNX

If:

$$f(x) = { x }^{ 2 }+4x$$

...for which value of $x$ does $f(x + 3) = -3$?

A

$-4$

B

$6$

C

$-10$

D

$4$

E

$8$