30=4.8x^2

Solution for 30=4.8x^2 equation:

30=4.8x^2

We move all terms to the left:

30-(4.8x^2)=0

We get rid of parentheses

-4.8x^2+30=0

a = -4.8; b = 0; c = +30;
Δ = b2-4ac
Δ = 02-4·(-4.8)·30
Δ = 576
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{576}=24$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-24}{2*-4.8}=\frac{-24}{-9.6}
=2+2.6666666666667/5.3333333333333
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+24}{2*-4.8}=\frac{24}{-9.6}
=-2+2.6666666666667/5.3333333333333
$