4x*x/2=70

Solution for 4x*x/2=70 equation:

4x*x/2=70

We move all terms to the left:

4x*x/2-(70)=0

We multiply all the terms by the denominator


4x*x-70*2=0

We add all the numbers together, and all the variables

4x*x-140=0

Wy multiply elements

4x^2-140=0

a = 4; b = 0; c = -140;
Δ = b2-4ac
Δ = 02-4·4·(-140)
Δ = 2240
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{2240}=\sqrt{64*35}=\sqrt{64}*\sqrt{35}=8\sqrt{35}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-8\sqrt{35}}{2*4}=\frac{0-8\sqrt{35}}{8}
=-\frac{8\sqrt{35}}{8}
=-\sqrt{35}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+8\sqrt{35}}{2*4}=\frac{0+8\sqrt{35}}{8}
=\frac{8\sqrt{35}}{8}
=\sqrt{35}
$