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x^2+7x-183.75=0
a = 1; b = 7; c = -183.75;
Δ = b2-4ac
Δ = 72-4·1·(-183.75)
Δ = 784
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{784}=28$$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(7)-28}{2*1}=\frac{-35}{2} =-17+1/2 $$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(7)+28}{2*1}=\frac{21}{2} =10+1/2 $
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