f(-3)=(-3+5)^2+2(-3)

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Solution for f(-3)=(-3+5)^2+2(-3) equation: 



f(-3)=(-3+5)^2+2(-3)

We move all terms to the left:

f(-3)-((-3+5)^2+2(-3))=0

We add all the numbers together, and all the variables

f(-3)-(2^2+2(-3))=0

We add all the numbers together, and all the variables

f(-3)+2=0

We multiply parentheses

-3f+2=0

We move all terms containing f to the left, all other terms to the right

-3f=-2

f=-2/-3

f=2/3

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