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(x-8)(480/x+3)=480
We move all terms to the left:
(x-8)(480/x+3)-(480)=0
Domain of the equation: x+3)!=0We multiply parentheses ..
x∈R
(+480x^2+3x-3840x-24)-480=0
We get rid of parentheses
480x^2+3x-3840x-24-480=0
We add all the numbers together, and all the variables
480x^2-3837x-504=0
a = 480; b = -3837; c = -504;
Δ = b2-4ac
Δ = -38372-4·480·(-504)
Δ = 15690249
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{15690249}=\sqrt{9*1743361}=\sqrt{9}*\sqrt{1743361}=3\sqrt{1743361}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3837)-3\sqrt{1743361}}{2*480}=\frac{3837-3\sqrt{1743361}}{960} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3837)+3\sqrt{1743361}}{2*480}=\frac{3837+3\sqrt{1743361}}{960} $
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