5/x+6/2x=-4

Solution for 5/x+6/2x=-4 equation:

5/x+6/2x=-4

We move all terms to the left:

5/x+6/2x-(-4)=0


Domain of the equation: x!=0

x∈R



Domain of the equation: 2x!=0

x!=0/2

x!=0

x∈R


We add all the numbers together, and all the variables

5/x+6/2x+4=0

We calculate fractions


10x/2x^2+6x/2x^2+4=0

We multiply all the terms by the denominator


10x+6x+4*2x^2=0

We add all the numbers together, and all the variables

16x+4*2x^2=0

Wy multiply elements

8x^2+16x=0

a = 8; b = 16; c = 0;
Δ = b2-4ac
Δ = 162-4·8·0
Δ = 256
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{256}=16$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(16)-16}{2*8}=\frac{-32}{16}
=-2
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(16)+16}{2*8}=\frac{0}{16}
=0
$