b^2+b=-20

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


Simplifying
b2 + b = -20

Reorder the terms:
b + b2 = -20

Solving
b + b2 = -20

Solving for variable 'b'.

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

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

Begin completing the square.

Move the constant term to the right:

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

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

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

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

The b term is b.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
b + 0.25 + b2 = -20 + 0.25

Reorder the terms:
0.25 + b + b2 = -20 + 0.25

Combine like terms: -20 + 0.25 = -19.75
0.25 + b + b2 = -19.75

Factor a perfect square on the left side:
(b + 0.5)(b + 0.5) = -19.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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