x^2+5x-10.5=0

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Solution for x^2+5x-10.5=0 equation: 



x^2+5x-10.5=0

a = 1; b = 5; c = -10.5;
Δ = b2-4ac
Δ = 52-4·1·(-10.5)
Δ = 67
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{-(5)-\sqrt{67}}{2*1}=\frac{-5-\sqrt{67}}{2}
$


$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+\sqrt{67}}{2*1}=\frac{-5+\sqrt{67}}{2}
$

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