4b^2-17=12b

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Solution for 4b^2-17=12b equation:


Simplifying
4b2 + -17 = 12b

Reorder the terms:
-17 + 4b2 = 12b

Solving
-17 + 4b2 = 12b

Solving for variable 'b'.

Reorder the terms:
-17 + -12b + 4b2 = 12b + -12b

Combine like terms: 12b + -12b = 0
-17 + -12b + 4b2 = 0

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

Divide each side by '4'.
-4.25 + -3b + b2 = 0

Move the constant term to the right:

Add '4.25' to each side of the equation.
-4.25 + -3b + 4.25 + b2 = 0 + 4.25

Reorder the terms:
-4.25 + 4.25 + -3b + b2 = 0 + 4.25

Combine like terms: -4.25 + 4.25 = 0.00
0.00 + -3b + b2 = 0 + 4.25
-3b + b2 = 0 + 4.25

Combine like terms: 0 + 4.25 = 4.25
-3b + b2 = 4.25

The b term is -3b.  Take half its coefficient (-1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
-3b + 2.25 + b2 = 4.25 + 2.25

Reorder the terms:
2.25 + -3b + b2 = 4.25 + 2.25

Combine like terms: 4.25 + 2.25 = 6.5
2.25 + -3b + b2 = 6.5

Factor a perfect square on the left side:
(b + -1.5)(b + -1.5) = 6.5

Calculate the square root of the right side: 2.549509757

Break this problem into two subproblems by setting 
(b + -1.5) equal to 2.549509757 and -2.549509757.

Subproblem 1

b + -1.5 = 2.549509757 Simplifying b + -1.5 = 2.549509757 Reorder the terms: -1.5 + b = 2.549509757 Solving -1.5 + b = 2.549509757 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + b = 2.549509757 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + b = 2.549509757 + 1.5 b = 2.549509757 + 1.5 Combine like terms: 2.549509757 + 1.5 = 4.049509757 b = 4.049509757 Simplifying b = 4.049509757

Subproblem 2

b + -1.5 = -2.549509757 Simplifying b + -1.5 = -2.549509757 Reorder the terms: -1.5 + b = -2.549509757 Solving -1.5 + b = -2.549509757 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '1.5' to each side of the equation. -1.5 + 1.5 + b = -2.549509757 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + b = -2.549509757 + 1.5 b = -2.549509757 + 1.5 Combine like terms: -2.549509757 + 1.5 = -1.049509757 b = -1.049509757 Simplifying b = -1.049509757

Solution

The solution to the problem is based on the solutions from the subproblems. b = {4.049509757, -1.049509757}

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