0=36-4.9x^2

Solution for 0=36-4.9x^2 equation:

0=36-4.9x^2

We move all terms to the left:

0-(36-4.9x^2)=0

We add all the numbers together, and all the variables

-(36-4.9x^2)=0

We get rid of parentheses

4.9x^2-36=0

a = 4.9; b = 0; c = -36;
Δ = b2-4ac
Δ = 02-4·4.9·(-36)
Δ = 705.6
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{-(0)-\sqrt{705.6}}{2*4.9}=\frac{0-\sqrt{705.6}}{9.8}
=-\frac{\sqrt{}}{9.8}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{705.6}}{2*4.9}=\frac{0+\sqrt{705.6}}{9.8}
=\frac{\sqrt{}}{9.8}
$