-270s=-9s^2

Solution for -270s=-9s^2 equation:

-270s=-9s^2

We move all terms to the left:

-270s-(-9s^2)=0

We get rid of parentheses

9s^2-270s=0

a = 9; b = -270; c = 0;
Δ = b2-4ac
Δ = -2702-4·9·0
Δ = 72900
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$s_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$s_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{72900}=270$
$s_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-270)-270}{2*9}=\frac{0}{18}
=0
$
$s_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-270)+270}{2*9}=\frac{540}{18}
=30
$