(3.8-x)*(-4.2-x)+16.64=0

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Solution for (3.8-x)*(-4.2-x)+16.64=0 equation: 



(3.8-x)(-4.2-x)+16.64=0

We add all the numbers together, and all the variables

(-1x+3.8)(-1x-4.2)+16.64=0

We multiply parentheses ..

(+x^2+4.2x-3.8x-15.96)+16.64=0

We get rid of parentheses

x^2+4.2x-3.8x-15.96+16.64=0

We add all the numbers together, and all the variables

x^2+0.4x+0.68=0

a = 1; b = 0.4; c = +0.68;
Δ = b2-4ac
Δ = 0.42-4·1·0.68
Δ = -2.56
Delta is less than zero, so there is no solution for the equation

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