0.45x^2+70x-9075=0

Solution for 0.45x^2+70x-9075=0 equation:

0.45x^2+70x-9075=0

a = 0.45; b = 70; c = -9075;
Δ = b2-4ac
Δ = 702-4·0.45·(-9075)
Δ = 21235
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(70)-\sqrt{21235}}{2*0.45}=\frac{-70-\sqrt{21235}}{0.9}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(70)+\sqrt{21235}}{2*0.45}=\frac{-70+\sqrt{21235}}{0.9}
$