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X2-60X-2000=0
We add all the numbers together, and all the variables
X^2-60X-2000=0
a = 1; b = -60; c = -2000;
Δ = b2-4ac
Δ = -602-4·1·(-2000)
Δ = 11600
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}$$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{11600}=\sqrt{400*29}=\sqrt{400}*\sqrt{29}=20\sqrt{29}$$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-60)-20\sqrt{29}}{2*1}=\frac{60-20\sqrt{29}}{2} $$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-60)+20\sqrt{29}}{2*1}=\frac{60+20\sqrt{29}}{2} $
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