X*x-25x-136x=0

Solution for X*x-25x-136x=0 equation:

X*X-25X-136X=0

We add all the numbers together, and all the variables

-161X+X*X=0

Wy multiply elements

X^2-161X=0

a = 1; b = -161; c = 0;
Δ = b2-4ac
Δ = -1612-4·1·0
Δ = 25921
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{25921}=161$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-161)-161}{2*1}=\frac{0}{2}
=0
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-161)+161}{2*1}=\frac{322}{2}
=161
$