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4.9x^2-98x-446=0
a = 4.9; b = -98; c = -446;
Δ = b2-4ac
Δ = -982-4·4.9·(-446)
Δ = 18345.6
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{-(-98)-\sqrt{18345.6}}{2*4.9}=\frac{98-\sqrt{18345.6}}{9.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-98)+\sqrt{18345.6}}{2*4.9}=\frac{98+\sqrt{18345.6}}{9.8} $
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