-64=w(w+16)

Solution for -64=w(w+16) equation:

-64=w(w+16)

We move all terms to the left:

-64-(w(w+16))=0


We calculate terms in parentheses: -(w(w+16)), so:

w(w+16)

We multiply parentheses

w^2+16w

Back to the equation:

-(w^2+16w)


We get rid of parentheses

-w^2-16w-64=0

We add all the numbers together, and all the variables

-1w^2-16w-64=0

a = -1; b = -16; c = -64;
Δ = b2-4ac
Δ = -162-4·(-1)·(-64)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$w=\frac{-b}{2a}=\frac{16}{-2}=-8$