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4.9x^2-14x-98=0
a = 4.9; b = -14; c = -98;
Δ = b2-4ac
Δ = -142-4·4.9·(-98)
Δ = 2116.8
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{-(-14)-\sqrt{2116.8}}{2*4.9}=\frac{14-\sqrt{2116.8}}{9.8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-14)+\sqrt{2116.8}}{2*4.9}=\frac{14+\sqrt{2116.8}}{9.8} $
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