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(-3/8)u=-10
We move all terms to the left:
(-3/8)u-(-10)=0
Domain of the equation: 8)u!=0We add all the numbers together, and all the variables
u!=0/1
u!=0
u∈R
(-3/8)u+10=0
We multiply parentheses
-3u^2+10=0
a = -3; b = 0; c = +10;
Δ = b2-4ac
Δ = 02-4·(-3)·10
Δ = 120
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}$$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{120}=\sqrt{4*30}=\sqrt{4}*\sqrt{30}=2\sqrt{30}$$u_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(0)-2\sqrt{30}}{2*-3}=\frac{0-2\sqrt{30}}{-6} =-\frac{2\sqrt{30}}{-6} =-\frac{\sqrt{30}}{-3} $$u_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0)+2\sqrt{30}}{2*-3}=\frac{0+2\sqrt{30}}{-6} =\frac{2\sqrt{30}}{-6} =\frac{\sqrt{30}}{-3} $
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