-9=-n(-8-7n)

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Solution for -9=-n(-8-7n) equation: 



-9=-n(-8-7n)

We move all terms to the left:

-9-(-n(-8-7n))=0

We add all the numbers together, and all the variables

-(-n(-7n-8))-9=0



We calculate terms in parentheses: -(-n(-7n-8)), so:

-n(-7n-8)

We multiply parentheses

7n^2+8n

Back to the equation:

-(7n^2+8n)



We get rid of parentheses

-7n^2-8n-9=0

a = -7; b = -8; c = -9;
Δ = b2-4ac
Δ = -82-4·(-7)·(-9)
Δ = -188
Delta is less than zero, so there is no solution for the equation

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