5b^2-5b=6

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Solution for 5b^2-5b=6 equation:


Simplifying
5b2 + -5b = 6

Reorder the terms:
-5b + 5b2 = 6

Solving
-5b + 5b2 = 6

Solving for variable 'b'.

Reorder the terms:
-6 + -5b + 5b2 = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + -5b + 5b2 = 0

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

Divide each side by '5'.
-1.2 + -1b + b2 = 0

Move the constant term to the right:

Add '1.2' to each side of the equation.
-1.2 + -1b + 1.2 + b2 = 0 + 1.2

Reorder the terms:
-1.2 + 1.2 + -1b + b2 = 0 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + -1b + b2 = 0 + 1.2
-1b + b2 = 0 + 1.2

Combine like terms: 0 + 1.2 = 1.2
-1b + b2 = 1.2

The b term is -1b.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1b + 0.25 + b2 = 1.2 + 0.25

Reorder the terms:
0.25 + -1b + b2 = 1.2 + 0.25

Combine like terms: 1.2 + 0.25 = 1.45
0.25 + -1b + b2 = 1.45

Factor a perfect square on the left side:
(b + -0.5)(b + -0.5) = 1.45

Calculate the square root of the right side: 1.204159458

Break this problem into two subproblems by setting 
(b + -0.5) equal to 1.204159458 and -1.204159458.

Subproblem 1

b + -0.5 = 1.204159458 Simplifying b + -0.5 = 1.204159458 Reorder the terms: -0.5 + b = 1.204159458 Solving -0.5 + b = 1.204159458 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + b = 1.204159458 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + b = 1.204159458 + 0.5 b = 1.204159458 + 0.5 Combine like terms: 1.204159458 + 0.5 = 1.704159458 b = 1.704159458 Simplifying b = 1.704159458

Subproblem 2

b + -0.5 = -1.204159458 Simplifying b + -0.5 = -1.204159458 Reorder the terms: -0.5 + b = -1.204159458 Solving -0.5 + b = -1.204159458 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + b = -1.204159458 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + b = -1.204159458 + 0.5 b = -1.204159458 + 0.5 Combine like terms: -1.204159458 + 0.5 = -0.704159458 b = -0.704159458 Simplifying b = -0.704159458

Solution

The solution to the problem is based on the solutions from the subproblems. b = {1.704159458, -0.704159458}

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