(7.6+2x)(7.6+2x)=0

Solution for (7.6+2x)(7.6+2x)=0 equation:

(7.6+2x)(7.6+2x)=0

We add all the numbers together, and all the variables

(2x+7.6)(2x+7.6)=0

We multiply parentheses ..

(+4x^2+15.2x+15.2x+57.76)=0

We get rid of parentheses

4x^2+15.2x+15.2x+57.76=0

We add all the numbers together, and all the variables

4x^2+30.4x+57.76=0

a = 4; b = 30.4; c = +57.76;
Δ = b2-4ac
Δ = 30.42-4·4·57.76
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{-30.4}{8}=-3+2.6666666666667/3.3333333333333$