X2+3x-1=153

Solution for X2+3x-1=153 equation:

X2+3X-1=153

We move all terms to the left:

X2+3X-1-(153)=0

We add all the numbers together, and all the variables

X^2+3X-154=0

a = 1; b = 3; c = -154;
Δ = b2-4ac
Δ = 32-4·1·(-154)
Δ = 625
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{625}=25$
$X_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-25}{2*1}=\frac{-28}{2}
=-14
$
$X_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+25}{2*1}=\frac{22}{2}
=11
$