19=3.14(x^2)

Solution for 19=3.14(x^2) equation:

19=3.14(x^2)

We move all terms to the left:

19-(3.14(x^2))=0

We get rid of parentheses

-3.14x^2+19=0

a = -3.14; b = 0; c = +19;
Δ = b2-4ac
Δ = 02-4·(-3.14)·19
Δ = 238.64
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{238.64}}{2*-3.14}=\frac{0-\sqrt{238.64}}{-6.28}
=-\frac{\sqrt{}}{-6.28}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+\sqrt{238.64}}{2*-3.14}=\frac{0+\sqrt{238.64}}{-6.28}
=\frac{\sqrt{}}{-6.28}
$