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x^2-9=3x+35
We move all terms to the left:
x^2-9-(3x+35)=0
We get rid of parentheses
x^2-3x-35-9=0
We add all the numbers together, and all the variables
x^2-3x-44=0
a = 1; b = -3; c = -44;
Δ = b2-4ac
Δ = -32-4·1·(-44)
Δ = 185
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-3)-\sqrt{185}}{2*1}=\frac{3-\sqrt{185}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-3)+\sqrt{185}}{2*1}=\frac{3+\sqrt{185}}{2} $
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