7n-2n(3n+1)=-5+9

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Solution for 7n-2n(3n+1)=-5+9 equation: 



7n-2n(3n+1)=-5+9

We move all terms to the left:

7n-2n(3n+1)-(-5+9)=0

We add all the numbers together, and all the variables

7n-2n(3n+1)-4=0

We multiply parentheses

-6n^2+7n-2n-4=0

We add all the numbers together, and all the variables

-6n^2+5n-4=0

a = -6; b = 5; c = -4;
Δ = b2-4ac
Δ = 52-4·(-6)·(-4)
Δ = -71
Delta is less than zero, so there is no solution for the equation

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