8b^2+16b-14=-3

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Solution for 8b^2+16b-14=-3 equation:


Simplifying
8b2 + 16b + -14 = -3

Reorder the terms:
-14 + 16b + 8b2 = -3

Solving
-14 + 16b + 8b2 = -3

Solving for variable 'b'.

Reorder the terms:
-14 + 3 + 16b + 8b2 = -3 + 3

Combine like terms: -14 + 3 = -11
-11 + 16b + 8b2 = -3 + 3

Combine like terms: -3 + 3 = 0
-11 + 16b + 8b2 = 0

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

Divide each side by '8'.
-1.375 + 2b + b2 = 0

Move the constant term to the right:

Add '1.375' to each side of the equation.
-1.375 + 2b + 1.375 + b2 = 0 + 1.375

Reorder the terms:
-1.375 + 1.375 + 2b + b2 = 0 + 1.375

Combine like terms: -1.375 + 1.375 = 0.000
0.000 + 2b + b2 = 0 + 1.375
2b + b2 = 0 + 1.375

Combine like terms: 0 + 1.375 = 1.375
2b + b2 = 1.375

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 = 1.375 + 1

Reorder the terms:
1 + 2b + b2 = 1.375 + 1

Combine like terms: 1.375 + 1 = 2.375
1 + 2b + b2 = 2.375

Factor a perfect square on the left side:
(b + 1)(b + 1) = 2.375

Calculate the square root of the right side: 1.541103501

Break this problem into two subproblems by setting 
(b + 1) equal to 1.541103501 and -1.541103501.

Subproblem 1

b + 1 = 1.541103501 Simplifying b + 1 = 1.541103501 Reorder the terms: 1 + b = 1.541103501 Solving 1 + b = 1.541103501 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 = 1.541103501 + -1 Combine like terms: 1 + -1 = 0 0 + b = 1.541103501 + -1 b = 1.541103501 + -1 Combine like terms: 1.541103501 + -1 = 0.541103501 b = 0.541103501 Simplifying b = 0.541103501

Subproblem 2

b + 1 = -1.541103501 Simplifying b + 1 = -1.541103501 Reorder the terms: 1 + b = -1.541103501 Solving 1 + b = -1.541103501 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 = -1.541103501 + -1 Combine like terms: 1 + -1 = 0 0 + b = -1.541103501 + -1 b = -1.541103501 + -1 Combine like terms: -1.541103501 + -1 = -2.541103501 b = -2.541103501 Simplifying b = -2.541103501

Solution

The solution to the problem is based on the solutions from the subproblems. b = {0.541103501, -2.541103501}

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