f(-7)=3(-7)-(-7)2+2

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Solution for f(-7)=3(-7)-(-7)2+2 equation: 



f(-7)=3(-7)-(-7)2+2

We move all terms to the left:

f(-7)-(3(-7)-(-7)2+2)=0

We add all the numbers together, and all the variables

f(-7)+5=0

We multiply parentheses

-7f+5=0

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

-7f=-5

f=-5/-7

f=5/7

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