-245=-45u^2

Solution for -245=-45u^2 equation:

-245=-45u^2

We move all terms to the left:

-245-(-45u^2)=0

We get rid of parentheses

45u^2-245=0

a = 45; b = 0; c = -245;
Δ = b2-4ac
Δ = 02-4·45·(-245)
Δ = 44100
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{44100}=210$
$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-210}{2*45}=\frac{-210}{90}
=-2+1/3
$
$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+210}{2*45}=\frac{210}{90}
=2+1/3
$