b^2+2b=(-20)

Solution for b^2+2b=(-20) equation:

Simplifying
b2 + 2b = (-20)

Reorder the terms:
2b + b2 = (-20)
2b + b2 = -20

Solving
2b + b2 = -20

Solving for variable 'b'.

Reorder the terms:
20 + 2b + b2 = -20 + 20

Combine like terms: -20 + 20 = 0
20 + 2b + b2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-20' to each side of the equation.
20 + 2b + -20 + b2 = 0 + -20

Reorder the terms:
20 + -20 + 2b + b2 = 0 + -20

Combine like terms: 20 + -20 = 0
0 + 2b + b2 = 0 + -20
2b + b2 = 0 + -20

Combine like terms: 0 + -20 = -20
2b + b2 = -20

The b term is 2b.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2b + 1 + b2 = -20 + 1

Reorder the terms:
1 + 2b + b2 = -20 + 1

Combine like terms: -20 + 1 = -19
1 + 2b + b2 = -19

Factor a perfect square on the left side:
(b + 1)(b + 1) = -19

Can't calculate square root of the right side.

The solution to this equation could not be determined.