4x(x+)=224

Solution for 4x(x+)=224 equation:

4x(x+)=224

We move all terms to the left:

4x(x+)-(224)=0

We add all the numbers together, and all the variables

4x(+x)-224=0

We multiply parentheses

4x^2-224=0

a = 4; b = 0; c = -224;
Δ = b2-4ac
Δ = 02-4·4·(-224)
Δ = 3584
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:

$\sqrt{\Delta}=\sqrt{3584}=\sqrt{256*14}=\sqrt{256}*\sqrt{14}=16\sqrt{14}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-16\sqrt{14}}{2*4}=\frac{0-16\sqrt{14}}{8}
=-\frac{16\sqrt{14}}{8}
=-2\sqrt{14}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+16\sqrt{14}}{2*4}=\frac{0+16\sqrt{14}}{8}
=\frac{16\sqrt{14}}{8}
=2\sqrt{14}
$