x*2x=648

Solution for x*2x=648 equation:

x*2x=648

We move all terms to the left:

x*2x-(648)=0

Wy multiply elements

2x^2-648=0

a = 2; b = 0; c = -648;
Δ = b2-4ac
Δ = 02-4·2·(-648)
Δ = 5184
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{5184}=72$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-72}{2*2}=\frac{-72}{4}
=-18
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+72}{2*2}=\frac{72}{4}
=18
$