-4x(x+3)=20

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Solution for -4x(x+3)=20 equation: 



-4x(x+3)=20

We move all terms to the left:

-4x(x+3)-(20)=0

We multiply parentheses

-4x^2-12x-20=0

a = -4; b = -12; c = -20;
Δ = b2-4ac
Δ = -122-4·(-4)·(-20)
Δ = -176
Delta is less than zero, so there is no solution for the equation

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