-26-6x=3x(-2x-6)

Solution for -26-6x=3x(-2x-6) equation:

-26-6x=3x(-2x-6)

We move all terms to the left:

-26-6x-(3x(-2x-6))=0


We calculate terms in parentheses: -(3x(-2x-6)), so:

3x(-2x-6)

We multiply parentheses

-6x^2-18x

Back to the equation:

-(-6x^2-18x)


We get rid of parentheses

6x^2+18x-6x-26=0

We add all the numbers together, and all the variables

6x^2+12x-26=0

a = 6; b = 12; c = -26;
Δ = b2-4ac
Δ = 122-4·6·(-26)
Δ = 768
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:

$\sqrt{\Delta}=\sqrt{768}=\sqrt{256*3}=\sqrt{256}*\sqrt{3}=16\sqrt{3}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(12)-16\sqrt{3}}{2*6}=\frac{-12-16\sqrt{3}}{12}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(12)+16\sqrt{3}}{2*6}=\frac{-12+16\sqrt{3}}{12}
$