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4x^2+0.00277x-0.0000388077=0
We add all the numbers together, and all the variables
4x^2+0.00277x-5-3.88077E=0
We add all the numbers together, and all the variables
4x^2+0.00277x-15.549026571429=0
a = 4; b = 0.00277; c = -15.549026571429;
Δ = b2-4ac
Δ = 0.002772-4·4·(-15.549026571429)
Δ = 248.78443281576
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{-(0.00277)-\sqrt{248.78443281576}}{2*4}=\frac{-0.00277-\sqrt{248.78443281576}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(0.00277)+\sqrt{248.78443281576}}{2*4}=\frac{-0.00277+\sqrt{248.78443281576}}{8} $
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