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x^2+3x-143=0
a = 1; b = 3; c = -143;
Δ = b2-4ac
Δ = 32-4·1·(-143)
Δ = 581
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{581}}{2*1}=\frac{-3-\sqrt{581}}{2} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+\sqrt{581}}{2*1}=\frac{-3+\sqrt{581}}{2} $
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