f(2)=-4(X+3)

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Solution for f(2)=-4(X+3) equation: 



f(2)=-4(f+3)

We move all terms to the left:

f(2)-(-4(f+3))=0

We add all the numbers together, and all the variables

f^2-(-4(f+3))=0



We calculate terms in parentheses: -(-4(f+3)), so:

-4(f+3)

We multiply parentheses

-4f-12

Back to the equation:

-(-4f-12)



We get rid of parentheses

f^2+4f+12=0

a = 1; b = 4; c = +12;
Δ = b2-4ac
Δ = 42-4·1·12
Δ = -32
Delta is less than zero, so there is no solution for the equation

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