0=n2+n-1260

Solution for 0=n2+n-1260 equation:

0=n2+n-1260

We move all terms to the left:

0-(n2+n-1260)=0

We add all the numbers together, and all the variables

-(+n^2+n-1260)+0=0

We add all the numbers together, and all the variables

-(+n^2+n-1260)=0

We get rid of parentheses

-n^2-n+1260=0

We add all the numbers together, and all the variables

-1n^2-1n+1260=0

a = -1; b = -1; c = +1260;
Δ = b2-4ac
Δ = -12-4·(-1)·1260
Δ = 5041
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{5041}=71$
$n_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(-1)-71}{2*-1}=\frac{-70}{-2}
=+35
$
$n_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(-1)+71}{2*-1}=\frac{72}{-2}
=-36
$