4b^2+6b=1

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Solution for 4b^2+6b=1 equation:


Simplifying
4b2 + 6b = 1

Reorder the terms:
6b + 4b2 = 1

Solving
6b + 4b2 = 1

Solving for variable 'b'.

Reorder the terms:
-1 + 6b + 4b2 = 1 + -1

Combine like terms: 1 + -1 = 0
-1 + 6b + 4b2 = 0

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

Divide each side by '4'.
-0.25 + 1.5b + b2 = 0

Move the constant term to the right:

Add '0.25' to each side of the equation.
-0.25 + 1.5b + 0.25 + b2 = 0 + 0.25

Reorder the terms:
-0.25 + 0.25 + 1.5b + b2 = 0 + 0.25

Combine like terms: -0.25 + 0.25 = 0.00
0.00 + 1.5b + b2 = 0 + 0.25
1.5b + b2 = 0 + 0.25

Combine like terms: 0 + 0.25 = 0.25
1.5b + b2 = 0.25

The b term is 1.5b.  Take half its coefficient (0.75).
Square it (0.5625) and add it to both sides.

Add '0.5625' to each side of the equation.
1.5b + 0.5625 + b2 = 0.25 + 0.5625

Reorder the terms:
0.5625 + 1.5b + b2 = 0.25 + 0.5625

Combine like terms: 0.25 + 0.5625 = 0.8125
0.5625 + 1.5b + b2 = 0.8125

Factor a perfect square on the left side:
(b + 0.75)(b + 0.75) = 0.8125

Calculate the square root of the right side: 0.901387819

Break this problem into two subproblems by setting 
(b + 0.75) equal to 0.901387819 and -0.901387819.

Subproblem 1

b + 0.75 = 0.901387819 Simplifying b + 0.75 = 0.901387819 Reorder the terms: 0.75 + b = 0.901387819 Solving 0.75 + b = 0.901387819 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + b = 0.901387819 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + b = 0.901387819 + -0.75 b = 0.901387819 + -0.75 Combine like terms: 0.901387819 + -0.75 = 0.151387819 b = 0.151387819 Simplifying b = 0.151387819

Subproblem 2

b + 0.75 = -0.901387819 Simplifying b + 0.75 = -0.901387819 Reorder the terms: 0.75 + b = -0.901387819 Solving 0.75 + b = -0.901387819 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-0.75' to each side of the equation. 0.75 + -0.75 + b = -0.901387819 + -0.75 Combine like terms: 0.75 + -0.75 = 0.00 0.00 + b = -0.901387819 + -0.75 b = -0.901387819 + -0.75 Combine like terms: -0.901387819 + -0.75 = -1.651387819 b = -1.651387819 Simplifying b = -1.651387819

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.151387819, -1.651387819}

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