x(3x+4)=-5

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Solution for x(3x+4)=-5 equation: 



x(3x+4)=-5

We move all terms to the left:

x(3x+4)-(-5)=0

We add all the numbers together, and all the variables

x(3x+4)+5=0

We multiply parentheses

3x^2+4x+5=0

a = 3; b = 4; c = +5;
Δ = b2-4ac
Δ = 42-4·3·5
Δ = -44
Delta is less than zero, so there is no solution for the equation

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