1250=x(100-2x)

Solution for 1250=x(100-2x) equation:

1250=x(100-2x)

We move all terms to the left:

1250-(x(100-2x))=0

We add all the numbers together, and all the variables

-(x(-2x+100))+1250=0


We calculate terms in parentheses: -(x(-2x+100)), so:

x(-2x+100)

We multiply parentheses

-2x^2+100x

Back to the equation:

-(-2x^2+100x)


We get rid of parentheses

2x^2-100x+1250=0

a = 2; b = -100; c = +1250;
Δ = b2-4ac
Δ = -1002-4·2·1250
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$x=\frac{-b}{2a}=\frac{100}{4}=25$