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3x^2/4(x+2)=-3/8
We move all terms to the left:
3x^2/4(x+2)-(-3/8)=0
Domain of the equation: 4(x+2)!=0We get rid of parentheses
x∈R
3x^2/4(x+2)+3/8=0
We calculate fractions
24x^2/(32x+64)+(12xx/(32x+64)=0
We calculate terms in parentheses: +(12xx/(32x+64), so:We multiply all the terms by the denominator
12xx/(32x+64
We multiply all the terms by the denominator
12xx
Back to the equation:
+(12xx)
24x^2+12xx*(32x+64)=0
We multiply parentheses
24x^2+384x^2+768x=0
We add all the numbers together, and all the variables
408x^2+768x=0
a = 408; b = 768; c = 0;
Δ = b2-4ac
Δ = 7682-4·408·0
Δ = 589824
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{589824}=768$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(768)-768}{2*408}=\frac{-1536}{816} =-1+15/17 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(768)+768}{2*408}=\frac{0}{816} =0 $
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