4x^2+9x=-42

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Solution for 4x^2+9x=-42 equation: 



4x^2+9x=-42

We move all terms to the left:

4x^2+9x-(-42)=0

We add all the numbers together, and all the variables

4x^2+9x+42=0

a = 4; b = 9; c = +42;
Δ = b2-4ac
Δ = 92-4·4·42
Δ = -591
Delta is less than zero, so there is no solution for the equation

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