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10x^2-61x-6=0
a = 10; b = -61; c = -6;
Δ = b2-4ac
Δ = -612-4·10·(-6)
Δ = 3961
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{-(-61)-\sqrt{3961}}{2*10}=\frac{61-\sqrt{3961}}{20} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-61)+\sqrt{3961}}{2*10}=\frac{61+\sqrt{3961}}{20} $
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