b^2-5b-46=

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Solution for b^2-5b-46= equation:


Simplifying
b2 + -5b + -46 = 0

Reorder the terms:
-46 + -5b + b2 = 0

Solving
-46 + -5b + b2 = 0

Solving for variable 'b'.

Begin completing the square.

Move the constant term to the right:

Add '46' to each side of the equation.
-46 + -5b + 46 + b2 = 0 + 46

Reorder the terms:
-46 + 46 + -5b + b2 = 0 + 46

Combine like terms: -46 + 46 = 0
0 + -5b + b2 = 0 + 46
-5b + b2 = 0 + 46

Combine like terms: 0 + 46 = 46
-5b + b2 = 46

The b term is -5b.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5b + 6.25 + b2 = 46 + 6.25

Reorder the terms:
6.25 + -5b + b2 = 46 + 6.25

Combine like terms: 46 + 6.25 = 52.25
6.25 + -5b + b2 = 52.25

Factor a perfect square on the left side:
(b + -2.5)(b + -2.5) = 52.25

Calculate the square root of the right side: 7.228416147

Break this problem into two subproblems by setting 
(b + -2.5) equal to 7.228416147 and -7.228416147.

Subproblem 1

b + -2.5 = 7.228416147 Simplifying b + -2.5 = 7.228416147 Reorder the terms: -2.5 + b = 7.228416147 Solving -2.5 + b = 7.228416147 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + b = 7.228416147 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + b = 7.228416147 + 2.5 b = 7.228416147 + 2.5 Combine like terms: 7.228416147 + 2.5 = 9.728416147 b = 9.728416147 Simplifying b = 9.728416147

Subproblem 2

b + -2.5 = -7.228416147 Simplifying b + -2.5 = -7.228416147 Reorder the terms: -2.5 + b = -7.228416147 Solving -2.5 + b = -7.228416147 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + b = -7.228416147 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + b = -7.228416147 + 2.5 b = -7.228416147 + 2.5 Combine like terms: -7.228416147 + 2.5 = -4.728416147 b = -4.728416147 Simplifying b = -4.728416147

Solution

The solution to the problem is based on the solutions from the subproblems. b = {9.728416147, -4.728416147}

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