2(2x+1)=0.5x(2x-14)

Solution for 2(2x+1)=0.5x(2x-14) equation:

2(2x+1)=0.5x(2x-14)

We move all terms to the left:

2(2x+1)-(0.5x(2x-14))=0

We multiply parentheses

4x-(0.5x(2x-14))+2=0


We calculate terms in parentheses: -(0.5x(2x-14)), so:

0.5x(2x-14)

We multiply parentheses

0x^2+0x

We add all the numbers together, and all the variables

x^2+x

Back to the equation:

-(x^2+x)


We get rid of parentheses

-x^2+4x-x+2=0

We add all the numbers together, and all the variables

-1x^2+3x+2=0

a = -1; b = 3; c = +2;
Δ = b2-4ac
Δ = 32-4·(-1)·2
Δ = 17
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-\sqrt{17}}{2*-1}=\frac{-3-\sqrt{17}}{-2}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{17}}{2*-1}=\frac{-3+\sqrt{17}}{-2}
$