0=b^2-8b+115

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Solution for 0=b^2-8b+115 equation:


Simplifying
0 = b2 + -8b + 115

Reorder the terms:
0 = 115 + -8b + b2

Solving
0 = 115 + -8b + b2

Solving for variable 'b'.

Combine like terms: 0 + -115 = -115
-115 + 8b + -1b2 = 115 + -8b + b2 + -115 + 8b + -1b2

Reorder the terms:
-115 + 8b + -1b2 = 115 + -115 + -8b + 8b + b2 + -1b2

Combine like terms: 115 + -115 = 0
-115 + 8b + -1b2 = 0 + -8b + 8b + b2 + -1b2
-115 + 8b + -1b2 = -8b + 8b + b2 + -1b2

Combine like terms: -8b + 8b = 0
-115 + 8b + -1b2 = 0 + b2 + -1b2
-115 + 8b + -1b2 = b2 + -1b2

Combine like terms: b2 + -1b2 = 0
-115 + 8b + -1b2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
115 + -8b + b2 = 0

Move the constant term to the right:

Add '-115' to each side of the equation.
115 + -8b + -115 + b2 = 0 + -115

Reorder the terms:
115 + -115 + -8b + b2 = 0 + -115

Combine like terms: 115 + -115 = 0
0 + -8b + b2 = 0 + -115
-8b + b2 = 0 + -115

Combine like terms: 0 + -115 = -115
-8b + b2 = -115

The b term is -8b.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8b + 16 + b2 = -115 + 16

Reorder the terms:
16 + -8b + b2 = -115 + 16

Combine like terms: -115 + 16 = -99
16 + -8b + b2 = -99

Factor a perfect square on the left side:
(b + -4)(b + -4) = -99

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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