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2c=9/5c+32
We move all terms to the left:
2c-(9/5c+32)=0
Domain of the equation: 5c+32)!=0We get rid of parentheses
c∈R
2c-9/5c-32=0
We multiply all the terms by the denominator
2c*5c-32*5c-9=0
Wy multiply elements
10c^2-160c-9=0
a = 10; b = -160; c = -9;
Δ = b2-4ac
Δ = -1602-4·10·(-9)
Δ = 25960
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$c_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$c_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{25960}=\sqrt{4*6490}=\sqrt{4}*\sqrt{6490}=2\sqrt{6490}$$c_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-160)-2\sqrt{6490}}{2*10}=\frac{160-2\sqrt{6490}}{20} $$c_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-160)+2\sqrt{6490}}{2*10}=\frac{160+2\sqrt{6490}}{20} $
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