-5x^2-25x+70=Y

Solution for -5x^2-25x+70=Y equation:

-5x^2-25x+70=

We move all terms to the left:

-5x^2-25x+70-()=0

We add all the numbers together, and all the variables

-5x^2-25x=0

a = -5; b = -25; c = 0;
Δ = b2-4ac
Δ = -252-4·(-5)·0
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{625}=25$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-25)-25}{2*-5}=\frac{0}{-10}
=0
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-25)+25}{2*-5}=\frac{50}{-10}
=-5
$