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-(x-3)+3/4x+5=0
Domain of the equation: 4x!=0We get rid of parentheses
x!=0/4
x!=0
x∈R
-x+3/4x+3+5=0
We multiply all the terms by the denominator
-x*4x+3*4x+5*4x+3=0
Wy multiply elements
-4x^2+12x+20x+3=0
We add all the numbers together, and all the variables
-4x^2+32x+3=0
a = -4; b = 32; c = +3;
Δ = b2-4ac
Δ = 322-4·(-4)·3
Δ = 1072
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{1072}=\sqrt{16*67}=\sqrt{16}*\sqrt{67}=4\sqrt{67}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(32)-4\sqrt{67}}{2*-4}=\frac{-32-4\sqrt{67}}{-8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(32)+4\sqrt{67}}{2*-4}=\frac{-32+4\sqrt{67}}{-8} $
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