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3/2v+5/7v=1
We move all terms to the left:
3/2v+5/7v-(1)=0
Domain of the equation: 2v!=0
v!=0/2
v!=0
v∈R
Domain of the equation: 7v!=0We calculate fractions
v!=0/7
v!=0
v∈R
21v/14v^2+10v/14v^2-1=0
We multiply all the terms by the denominator
21v+10v-1*14v^2=0
We add all the numbers together, and all the variables
31v-1*14v^2=0
Wy multiply elements
-14v^2+31v=0
a = -14; b = 31; c = 0;
Δ = b2-4ac
Δ = 312-4·(-14)·0
Δ = 961
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{961}=31$$v_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(31)-31}{2*-14}=\frac{-62}{-28} =2+3/14 $$v_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(31)+31}{2*-14}=\frac{0}{-28} =0 $
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