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x2+30x+104=0
We add all the numbers together, and all the variables
x^2+30x+104=0
a = 1; b = 30; c = +104;
Δ = b2-4ac
Δ = 302-4·1·104
Δ = 484
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{484}=22$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(30)-22}{2*1}=\frac{-52}{2} =-26 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(30)+22}{2*1}=\frac{-8}{2} =-4 $
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