x^2+4x-162=0

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Solution for x^2+4x-162=0 equation:


Simplifying
x2 + 4x + -162 = 0

Reorder the terms:
-162 + 4x + x2 = 0

Solving
-162 + 4x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '162' to each side of the equation.
-162 + 4x + 162 + x2 = 0 + 162

Reorder the terms:
-162 + 162 + 4x + x2 = 0 + 162

Combine like terms: -162 + 162 = 0
0 + 4x + x2 = 0 + 162
4x + x2 = 0 + 162

Combine like terms: 0 + 162 = 162
4x + x2 = 162

The x term is 4x.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4x + 4 + x2 = 162 + 4

Reorder the terms:
4 + 4x + x2 = 162 + 4

Combine like terms: 162 + 4 = 166
4 + 4x + x2 = 166

Factor a perfect square on the left side:
(x + 2)(x + 2) = 166

Calculate the square root of the right side: 12.884098727

Break this problem into two subproblems by setting 
(x + 2) equal to 12.884098727 and -12.884098727.

Subproblem 1

x + 2 = 12.884098727 Simplifying x + 2 = 12.884098727 Reorder the terms: 2 + x = 12.884098727 Solving 2 + x = 12.884098727 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 12.884098727 + -2 Combine like terms: 2 + -2 = 0 0 + x = 12.884098727 + -2 x = 12.884098727 + -2 Combine like terms: 12.884098727 + -2 = 10.884098727 x = 10.884098727 Simplifying x = 10.884098727

Subproblem 2

x + 2 = -12.884098727 Simplifying x + 2 = -12.884098727 Reorder the terms: 2 + x = -12.884098727 Solving 2 + x = -12.884098727 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -12.884098727 + -2 Combine like terms: 2 + -2 = 0 0 + x = -12.884098727 + -2 x = -12.884098727 + -2 Combine like terms: -12.884098727 + -2 = -14.884098727 x = -14.884098727 Simplifying x = -14.884098727

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.884098727, -14.884098727}

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