(2w+9)(2w+9)=0

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Solution for (2w+9)(2w+9)=0 equation: 



(2w+9)(2w+9)=0

We multiply parentheses ..

(+4w^2+18w+18w+81)=0

We get rid of parentheses

4w^2+18w+18w+81=0

We add all the numbers together, and all the variables

4w^2+36w+81=0

a = 4; b = 36; c = +81;
Δ = b2-4ac
Δ = 362-4·4·81
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$w=\frac{-b}{2a}=\frac{-36}{8}=-4+1/2$

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