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5=x+3/2x-5
We move all terms to the left:
5-(x+3/2x-5)=0
Domain of the equation: 2x-5)!=0We get rid of parentheses
x∈R
-x-3/2x+5+5=0
We multiply all the terms by the denominator
-x*2x+5*2x+5*2x-3=0
Wy multiply elements
-2x^2+10x+10x-3=0
We add all the numbers together, and all the variables
-2x^2+20x-3=0
a = -2; b = 20; c = -3;
Δ = b2-4ac
Δ = 202-4·(-2)·(-3)
Δ = 376
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{376}=\sqrt{4*94}=\sqrt{4}*\sqrt{94}=2\sqrt{94}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(20)-2\sqrt{94}}{2*-2}=\frac{-20-2\sqrt{94}}{-4} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(20)+2\sqrt{94}}{2*-2}=\frac{-20+2\sqrt{94}}{-4} $
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