112=28x2

Solution for 112=28x2 equation:

112=28x^2

We move all terms to the left:

112-(28x^2)=0

a = -28; b = 0; c = +112;
Δ = b2-4ac
Δ = 02-4·(-28)·112
Δ = 12544
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{12544}=112$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-112}{2*-28}=\frac{-112}{-56}
=+2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+112}{2*-28}=\frac{112}{-56}
=-2
$