3b^2-10=-2b

Solution for 3b^2-10=-2b equation:

3b^2-10=-2b

We move all terms to the left:

3b^2-10-(-2b)=0

We get rid of parentheses

3b^2+2b-10=0

a = 3; b = 2; c = -10;
Δ = b2-4ac
Δ = 22-4·3·(-10)
Δ = 124
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}$

The end solution:

$\sqrt{\Delta}=\sqrt{124}=\sqrt{4*31}=\sqrt{4}*\sqrt{31}=2\sqrt{31}$
$b_{1}=\frac{-b-\sqrt{\Delta}}{2a}=\frac{-(2)-2\sqrt{31}}{2*3}=\frac{-2-2\sqrt{31}}{6}
$
$b_{2}=\frac{-b+\sqrt{\Delta}}{2a}=\frac{-(2)+2\sqrt{31}}{2*3}=\frac{-2+2\sqrt{31}}{6}
$