9b^2-7b-24=-11b

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Solution for 9b^2-7b-24=-11b equation:


Simplifying
9b2 + -7b + -24 = -11b

Reorder the terms:
-24 + -7b + 9b2 = -11b

Solving
-24 + -7b + 9b2 = -11b

Solving for variable 'b'.

Reorder the terms:
-24 + -7b + 11b + 9b2 = -11b + 11b

Combine like terms: -7b + 11b = 4b
-24 + 4b + 9b2 = -11b + 11b

Combine like terms: -11b + 11b = 0
-24 + 4b + 9b2 = 0

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

Divide each side by '9'.
-2.666666667 + 0.4444444444b + b2 = 0

Move the constant term to the right:

Add '2.666666667' to each side of the equation.
-2.666666667 + 0.4444444444b + 2.666666667 + b2 = 0 + 2.666666667

Reorder the terms:
-2.666666667 + 2.666666667 + 0.4444444444b + b2 = 0 + 2.666666667

Combine like terms: -2.666666667 + 2.666666667 = 0.000000000
0.000000000 + 0.4444444444b + b2 = 0 + 2.666666667
0.4444444444b + b2 = 0 + 2.666666667

Combine like terms: 0 + 2.666666667 = 2.666666667
0.4444444444b + b2 = 2.666666667

The b term is 0.4444444444b.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444b + 0.04938271604 + b2 = 2.666666667 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444b + b2 = 2.666666667 + 0.04938271604

Combine like terms: 2.666666667 + 0.04938271604 = 2.71604938304
0.04938271604 + 0.4444444444b + b2 = 2.71604938304

Factor a perfect square on the left side:
(b + 0.2222222222)(b + 0.2222222222) = 2.71604938304

Calculate the square root of the right side: 1.648044108

Break this problem into two subproblems by setting 
(b + 0.2222222222) equal to 1.648044108 and -1.648044108.

Subproblem 1

b + 0.2222222222 = 1.648044108 Simplifying b + 0.2222222222 = 1.648044108 Reorder the terms: 0.2222222222 + b = 1.648044108 Solving 0.2222222222 + b = 1.648044108 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + b = 1.648044108 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + b = 1.648044108 + -0.2222222222 b = 1.648044108 + -0.2222222222 Combine like terms: 1.648044108 + -0.2222222222 = 1.4258218858 b = 1.4258218858 Simplifying b = 1.4258218858

Subproblem 2

b + 0.2222222222 = -1.648044108 Simplifying b + 0.2222222222 = -1.648044108 Reorder the terms: 0.2222222222 + b = -1.648044108 Solving 0.2222222222 + b = -1.648044108 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + b = -1.648044108 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + b = -1.648044108 + -0.2222222222 b = -1.648044108 + -0.2222222222 Combine like terms: -1.648044108 + -0.2222222222 = -1.8702663302 b = -1.8702663302 Simplifying b = -1.8702663302

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.4258218858, -1.8702663302}

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