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4x^2+17x-2=0
a = 4; b = 17; c = -2;
Δ = b2-4ac
Δ = 172-4·4·(-2)
Δ = 321
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{-(17)-\sqrt{321}}{2*4}=\frac{-17-\sqrt{321}}{8} $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(17)+\sqrt{321}}{2*4}=\frac{-17+\sqrt{321}}{8} $
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