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-3(-8-x)=(1/3)(x+56)
We move all terms to the left:
-3(-8-x)-((1/3)(x+56))=0
Domain of the equation: 3)(x+56))!=0We add all the numbers together, and all the variables
x∈R
-3(-1x-8)-((+1/3)(x+56))=0
We multiply parentheses
3x-((+1/3)(x+56))+24=0
We multiply parentheses ..
-((+x^2+1/3*56))+3x+24=0
We multiply all the terms by the denominator
-((+x^2+1+3x*3*56))+24*3*56))=0
We calculate terms in parentheses: -((+x^2+1+3x*3*56)), so:We add all the numbers together, and all the variables
(+x^2+1+3x*3*56)
We get rid of parentheses
x^2+3x*3*56+1
Wy multiply elements
x^2+504x*5+1
Wy multiply elements
x^2+2520x+1
Back to the equation:
-(x^2+2520x+1)
-(x^2+2520x+1)=0
We get rid of parentheses
-x^2-2520x-1=0
We add all the numbers together, and all the variables
-1x^2-2520x-1=0
a = -1; b = -2520; c = -1;
Δ = b2-4ac
Δ = -25202-4·(-1)·(-1)
Δ = 6350396
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{6350396}=\sqrt{4*1587599}=\sqrt{4}*\sqrt{1587599}=2\sqrt{1587599}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-2520)-2\sqrt{1587599}}{2*-1}=\frac{2520-2\sqrt{1587599}}{-2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-2520)+2\sqrt{1587599}}{2*-1}=\frac{2520+2\sqrt{1587599}}{-2} $
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