5b^2-b-24=0

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Solution for 5b^2-b-24=0 equation:


Simplifying
5b2 + -1b + -24 = 0

Reorder the terms:
-24 + -1b + 5b2 = 0

Solving
-24 + -1b + 5b2 = 0

Solving for variable 'b'.

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

Divide each side by '5'.
-4.8 + -0.2b + b2 = 0

Move the constant term to the right:

Add '4.8' to each side of the equation.
-4.8 + -0.2b + 4.8 + b2 = 0 + 4.8

Reorder the terms:
-4.8 + 4.8 + -0.2b + b2 = 0 + 4.8

Combine like terms: -4.8 + 4.8 = 0.0
0.0 + -0.2b + b2 = 0 + 4.8
-0.2b + b2 = 0 + 4.8

Combine like terms: 0 + 4.8 = 4.8
-0.2b + b2 = 4.8

The b term is -0.2b.  Take half its coefficient (-0.1).
Square it (0.01) and add it to both sides.

Add '0.01' to each side of the equation.
-0.2b + 0.01 + b2 = 4.8 + 0.01

Reorder the terms:
0.01 + -0.2b + b2 = 4.8 + 0.01

Combine like terms: 4.8 + 0.01 = 4.81
0.01 + -0.2b + b2 = 4.81

Factor a perfect square on the left side:
(b + -0.1)(b + -0.1) = 4.81

Calculate the square root of the right side: 2.19317122

Break this problem into two subproblems by setting 
(b + -0.1) equal to 2.19317122 and -2.19317122.

Subproblem 1

b + -0.1 = 2.19317122 Simplifying b + -0.1 = 2.19317122 Reorder the terms: -0.1 + b = 2.19317122 Solving -0.1 + b = 2.19317122 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + b = 2.19317122 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + b = 2.19317122 + 0.1 b = 2.19317122 + 0.1 Combine like terms: 2.19317122 + 0.1 = 2.29317122 b = 2.29317122 Simplifying b = 2.29317122

Subproblem 2

b + -0.1 = -2.19317122 Simplifying b + -0.1 = -2.19317122 Reorder the terms: -0.1 + b = -2.19317122 Solving -0.1 + b = -2.19317122 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.1' to each side of the equation. -0.1 + 0.1 + b = -2.19317122 + 0.1 Combine like terms: -0.1 + 0.1 = 0.0 0.0 + b = -2.19317122 + 0.1 b = -2.19317122 + 0.1 Combine like terms: -2.19317122 + 0.1 = -2.09317122 b = -2.09317122 Simplifying b = -2.09317122

Solution

The solution to the problem is based on the solutions from the subproblems. b = {2.29317122, -2.09317122}

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