X^2+11x-87=0

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Solution for X^2+11x-87=0 equation: 



X^2+11X-87=0

a = 1; b = 11; c = -87;
Δ = b2-4ac
Δ = 112-4·1·(-87)
Δ = 469
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{-(11)-\sqrt{469}}{2*1}=\frac{-11-\sqrt{469}}{2}
$


$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(11)+\sqrt{469}}{2*1}=\frac{-11+\sqrt{469}}{2}
$

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