4b^2+8b-3=0

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Solution for 4b^2+8b-3=0 equation:


Simplifying
4b2 + 8b + -3 = 0

Reorder the terms:
-3 + 8b + 4b2 = 0

Solving
-3 + 8b + 4b2 = 0

Solving for variable 'b'.

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

Divide each side by '4'.
-0.75 + 2b + b2 = 0

Move the constant term to the right:

Add '0.75' to each side of the equation.
-0.75 + 2b + 0.75 + b2 = 0 + 0.75

Reorder the terms:
-0.75 + 0.75 + 2b + b2 = 0 + 0.75

Combine like terms: -0.75 + 0.75 = 0.00
0.00 + 2b + b2 = 0 + 0.75
2b + b2 = 0 + 0.75

Combine like terms: 0 + 0.75 = 0.75
2b + b2 = 0.75

The b term is 2b.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2b + 1 + b2 = 0.75 + 1

Reorder the terms:
1 + 2b + b2 = 0.75 + 1

Combine like terms: 0.75 + 1 = 1.75
1 + 2b + b2 = 1.75

Factor a perfect square on the left side:
(b + 1)(b + 1) = 1.75

Calculate the square root of the right side: 1.322875656

Break this problem into two subproblems by setting 
(b + 1) equal to 1.322875656 and -1.322875656.

Subproblem 1

b + 1 = 1.322875656 Simplifying b + 1 = 1.322875656 Reorder the terms: 1 + b = 1.322875656 Solving 1 + b = 1.322875656 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + b = 1.322875656 + -1 Combine like terms: 1 + -1 = 0 0 + b = 1.322875656 + -1 b = 1.322875656 + -1 Combine like terms: 1.322875656 + -1 = 0.322875656 b = 0.322875656 Simplifying b = 0.322875656

Subproblem 2

b + 1 = -1.322875656 Simplifying b + 1 = -1.322875656 Reorder the terms: 1 + b = -1.322875656 Solving 1 + b = -1.322875656 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + b = -1.322875656 + -1 Combine like terms: 1 + -1 = 0 0 + b = -1.322875656 + -1 b = -1.322875656 + -1 Combine like terms: -1.322875656 + -1 = -2.322875656 b = -2.322875656 Simplifying b = -2.322875656

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.322875656, -2.322875656}

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