X2+5x-1400=0

Solution for X2+5x-1400=0 equation:

X2+5X-1400=0

We add all the numbers together, and all the variables

X^2+5X-1400=0

a = 1; b = 5; c = -1400;
Δ = b2-4ac
Δ = 52-4·1·(-1400)
Δ = 5625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{5625}=75$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(5)-75}{2*1}=\frac{-80}{2}
=-40
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(5)+75}{2*1}=\frac{70}{2}
=35
$