0=4.9t^2-13.63+2.16

Solution for 0=4.9t^2-13.63+2.16 equation:

0=4.9t^2-13.63+2.16

We move all terms to the left:

0-(4.9t^2-13.63+2.16)=0

We add all the numbers together, and all the variables

-(4.9t^2-13.63+2.16)=0

We get rid of parentheses

-4.9t^2+13.63-2.16=0

We add all the numbers together, and all the variables

-4.9t^2+11.47=0

a = -4.9; b = 0; c = +11.47;
Δ = b2-4ac
Δ = 02-4·(-4.9)·11.47
Δ = 224.812
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-\sqrt{224.812}}{2*-4.9}=\frac{0-\sqrt{224.812}}{-9.8}
=-\frac{\sqrt{}}{-9.8}
$
$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{224.812}}{2*-4.9}=\frac{0+\sqrt{224.812}}{-9.8}
=\frac{\sqrt{}}{-9.8}
$