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x^2+2x-1000000=0
a = 1; b = 2; c = -1000000;
Δ = b2-4ac
Δ = 22-4·1·(-1000000)
Δ = 4000004
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$
The end solution:
$\sqrt{\Delta}=\sqrt{4000004}=\sqrt{4*1000001}=\sqrt{4}*\sqrt{1000001}=2\sqrt{1000001}$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{1000001}}{2*1}=\frac{-2-2\sqrt{1000001}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{1000001}}{2*1}=\frac{-2+2\sqrt{1000001}}{2} $
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