-5x(9x+3)-3=12

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Solution for -5x(9x+3)-3=12 equation: 



-5x(9x+3)-3=12

We move all terms to the left:

-5x(9x+3)-3-(12)=0

We add all the numbers together, and all the variables

-5x(9x+3)-15=0

We multiply parentheses

-45x^2-15x-15=0

a = -45; b = -15; c = -15;
Δ = b2-4ac
Δ = -152-4·(-45)·(-15)
Δ = -2475
Delta is less than zero, so there is no solution for the equation

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