2x*8x-4=70

Solution for 2x*8x-4=70 equation:

2x*8x-4=70

We move all terms to the left:

2x*8x-4-(70)=0

We add all the numbers together, and all the variables

2x*8x-74=0

Wy multiply elements

16x^2-74=0

a = 16; b = 0; c = -74;
Δ = b2-4ac
Δ = 02-4·16·(-74)
Δ = 4736
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:

$\sqrt{\Delta}=\sqrt{4736}=\sqrt{64*74}=\sqrt{64}*\sqrt{74}=8\sqrt{74}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-8\sqrt{74}}{2*16}=\frac{0-8\sqrt{74}}{32}
=-\frac{8\sqrt{74}}{32}
=-\frac{\sqrt{74}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+8\sqrt{74}}{2*16}=\frac{0+8\sqrt{74}}{32}
=\frac{8\sqrt{74}}{32}
=\frac{\sqrt{74}}{4}
$