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2x^2+x-528=0
a = 2; b = 1; c = -528;
Δ = b2-4ac
Δ = 12-4·2·(-528)
Δ = 4225
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}$$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$$\sqrt{\Delta}=\sqrt{4225}=65$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(1)-65}{2*2}=\frac{-66}{4} =-16+1/2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(1)+65}{2*2}=\frac{64}{4} =16 $
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