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3/2t-1/5t=2
We move all terms to the left:
3/2t-1/5t-(2)=0
Domain of the equation: 2t!=0
t!=0/2
t!=0
t∈R
Domain of the equation: 5t!=0We calculate fractions
t!=0/5
t!=0
t∈R
15t/10t^2+(-2t)/10t^2-2=0
We multiply all the terms by the denominator
15t+(-2t)-2*10t^2=0
Wy multiply elements
-20t^2+15t+(-2t)=0
We get rid of parentheses
-20t^2+15t-2t=0
We add all the numbers together, and all the variables
-20t^2+13t=0
a = -20; b = 13; c = 0;
Δ = b2-4ac
Δ = 132-4·(-20)·0
Δ = 169
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{169}=13$$t_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(13)-13}{2*-20}=\frac{-26}{-40} =13/20 $$t_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(13)+13}{2*-20}=\frac{0}{-40} =0 $
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