4x(x+2)-5=-21

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Solution for 4x(x+2)-5=-21 equation: 



4x(x+2)-5=-21

We move all terms to the left:

4x(x+2)-5-(-21)=0

We add all the numbers together, and all the variables

4x(x+2)+16=0

We multiply parentheses

4x^2+8x+16=0

a = 4; b = 8; c = +16;
Δ = b2-4ac
Δ = 82-4·4·16
Δ = -192
Delta is less than zero, so there is no solution for the equation

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