b^2+6b+72=0

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Solution for b^2+6b+72=0 equation:


Simplifying
b2 + 6b + 72 = 0

Reorder the terms:
72 + 6b + b2 = 0

Solving
72 + 6b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '-72' to each side of the equation.
72 + 6b + -72 + b2 = 0 + -72

Reorder the terms:
72 + -72 + 6b + b2 = 0 + -72

Combine like terms: 72 + -72 = 0
0 + 6b + b2 = 0 + -72
6b + b2 = 0 + -72

Combine like terms: 0 + -72 = -72
6b + b2 = -72

The b term is 6b.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6b + 9 + b2 = -72 + 9

Reorder the terms:
9 + 6b + b2 = -72 + 9

Combine like terms: -72 + 9 = -63
9 + 6b + b2 = -63

Factor a perfect square on the left side:
(b + 3)(b + 3) = -63

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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