4x*7x=25200

Solution for 4x*7x=25200 equation:

4x*7x=25200

We move all terms to the left:

4x*7x-(25200)=0

Wy multiply elements

28x^2-25200=0

a = 28; b = 0; c = -25200;
Δ = b2-4ac
Δ = 02-4·28·(-25200)
Δ = 2822400
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{2822400}=1680$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-1680}{2*28}=\frac{-1680}{56}
=-30
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+1680}{2*28}=\frac{1680}{56}
=30
$