4x+1/2x-5=9

Solution for 4x+1/2x-5=9 equation:

4x+1/2x-5=9

We move all terms to the left:

4x+1/2x-5-(9)=0


Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We add all the numbers together, and all the variables

4x+1/2x-14=0

We multiply all the terms by the denominator


4x*2x-14*2x+1=0

Wy multiply elements

8x^2-28x+1=0

a = 8; b = -28; c = +1;
Δ = b2-4ac
Δ = -282-4·8·1
Δ = 752
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:

$\sqrt{\Delta}=\sqrt{752}=\sqrt{16*47}=\sqrt{16}*\sqrt{47}=4\sqrt{47}$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-28)-4\sqrt{47}}{2*8}=\frac{28-4\sqrt{47}}{16}
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-28)+4\sqrt{47}}{2*8}=\frac{28+4\sqrt{47}}{16}
$