27=(x+6)(x)

Solution for 27=(x+6)(x) equation:

27=(x+6)(x)

We move all terms to the left:

27-((x+6)(x))=0


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

(x+6)x

We multiply parentheses

x^2+6x

Back to the equation:

-(x^2+6x)


We get rid of parentheses

-x^2-6x+27=0

We add all the numbers together, and all the variables

-1x^2-6x+27=0

a = -1; b = -6; c = +27;
Δ = b2-4ac
Δ = -62-4·(-1)·27
Δ = 144
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{144}=12$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-6)-12}{2*-1}=\frac{-6}{-2}
=+3
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-6)+12}{2*-1}=\frac{18}{-2}
=-9
$