-x(5x+6)=18

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Solution for -x(5x+6)=18 equation: 



-x(5x+6)=18

We move all terms to the left:

-x(5x+6)-(18)=0

We multiply parentheses

-5x^2-6x-18=0

a = -5; b = -6; c = -18;
Δ = b2-4ac
Δ = -62-4·(-5)·(-18)
Δ = -324
Delta is less than zero, so there is no solution for the equation

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