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3/1(x)+1/2(x)-135=180
We move all terms to the left:
3/1(x)+1/2(x)-135-(180)=0
Domain of the equation: 1x!=0
x∈R
Domain of the equation: 2x!=0We add all the numbers together, and all the variables
x!=0/2
x!=0
x∈R
3/1x+1/2x-315=0
We calculate fractions
6x/2x^2+x/2x^2-315=0
We multiply all the terms by the denominator
6x+x-315*2x^2=0
We add all the numbers together, and all the variables
7x-315*2x^2=0
Wy multiply elements
-630x^2+7x=0
a = -630; b = 7; c = 0;
Δ = b2-4ac
Δ = 72-4·(-630)·0
Δ = 49
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{49}=7$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-7}{2*-630}=\frac{-14}{-1260} =1/90 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+7}{2*-630}=\frac{0}{-1260} =0 $
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