A^2+2A+2-1=167

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Solution for A^2+2A+2-1=167 equation:


Simplifying
A2 + 2A + 2 + -1 = 167

Reorder the terms:
2 + -1 + 2A + A2 = 167

Combine like terms: 2 + -1 = 1
1 + 2A + A2 = 167

Solving
1 + 2A + A2 = 167

Solving for variable 'A'.

Reorder the terms:
1 + -167 + 2A + A2 = 167 + -167

Combine like terms: 1 + -167 = -166
-166 + 2A + A2 = 167 + -167

Combine like terms: 167 + -167 = 0
-166 + 2A + A2 = 0

Begin completing the square.

Move the constant term to the right:

Add '166' to each side of the equation.
-166 + 2A + 166 + A2 = 0 + 166

Reorder the terms:
-166 + 166 + 2A + A2 = 0 + 166

Combine like terms: -166 + 166 = 0
0 + 2A + A2 = 0 + 166
2A + A2 = 0 + 166

Combine like terms: 0 + 166 = 166
2A + A2 = 166

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

Add '1' to each side of the equation.
2A + 1 + A2 = 166 + 1

Reorder the terms:
1 + 2A + A2 = 166 + 1

Combine like terms: 166 + 1 = 167
1 + 2A + A2 = 167

Factor a perfect square on the left side:
(A + 1)(A + 1) = 167

Calculate the square root of the right side: 12.922847983

Break this problem into two subproblems by setting 
(A + 1) equal to 12.922847983 and -12.922847983.

Subproblem 1

A + 1 = 12.922847983 Simplifying A + 1 = 12.922847983 Reorder the terms: 1 + A = 12.922847983 Solving 1 + A = 12.922847983 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + A = 12.922847983 + -1 Combine like terms: 1 + -1 = 0 0 + A = 12.922847983 + -1 A = 12.922847983 + -1 Combine like terms: 12.922847983 + -1 = 11.922847983 A = 11.922847983 Simplifying A = 11.922847983

Subproblem 2

A + 1 = -12.922847983 Simplifying A + 1 = -12.922847983 Reorder the terms: 1 + A = -12.922847983 Solving 1 + A = -12.922847983 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + A = -12.922847983 + -1 Combine like terms: 1 + -1 = 0 0 + A = -12.922847983 + -1 A = -12.922847983 + -1 Combine like terms: -12.922847983 + -1 = -13.922847983 A = -13.922847983 Simplifying A = -13.922847983

Solution

The solution to the problem is based on the solutions from the subproblems. A = {11.922847983, -13.922847983}

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