2x(x+3)=2x+11

Solution for 2x(x+3)=2x+11 equation:

2x(x+3)=2x+11

We move all terms to the left:

2x(x+3)-(2x+11)=0

We multiply parentheses

2x^2+6x-(2x+11)=0

We get rid of parentheses

2x^2+6x-2x-11=0

We add all the numbers together, and all the variables

2x^2+4x-11=0

a = 2; b = 4; c = -11;
Δ = b2-4ac
Δ = 42-4·2·(-11)
Δ = 104
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:

$\sqrt{\Delta}=\sqrt{104}=\sqrt{4*26}=\sqrt{4}*\sqrt{26}=2\sqrt{26}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(4)-2\sqrt{26}}{2*2}=\frac{-4-2\sqrt{26}}{4}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(4)+2\sqrt{26}}{2*2}=\frac{-4+2\sqrt{26}}{4}
$