3x^2+3x=1260

Solution for 3x^2+3x=1260 equation:

3x^2+3x=1260

We move all terms to the left:

3x^2+3x-(1260)=0

a = 3; b = 3; c = -1260;
Δ = b2-4ac
Δ = 32-4·3·(-1260)
Δ = 15129
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

$\sqrt{\Delta}=\sqrt{15129}=123$
$x_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(3)-123}{2*3}=\frac{-126}{6}
=-21
$
$x_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(3)+123}{2*3}=\frac{120}{6}
=20
$