x^2+40x+224=0

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Solution for x^2+40x+224=0 equation:


Simplifying
x2 + 40x + 224 = 0

Reorder the terms:
224 + 40x + x2 = 0

Solving
224 + 40x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-224' to each side of the equation.
224 + 40x + -224 + x2 = 0 + -224

Reorder the terms:
224 + -224 + 40x + x2 = 0 + -224

Combine like terms: 224 + -224 = 0
0 + 40x + x2 = 0 + -224
40x + x2 = 0 + -224

Combine like terms: 0 + -224 = -224
40x + x2 = -224

The x term is 40x.  Take half its coefficient (20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
40x + 400 + x2 = -224 + 400

Reorder the terms:
400 + 40x + x2 = -224 + 400

Combine like terms: -224 + 400 = 176
400 + 40x + x2 = 176

Factor a perfect square on the left side:
(x + 20)(x + 20) = 176

Calculate the square root of the right side: 13.266499161

Break this problem into two subproblems by setting 
(x + 20) equal to 13.266499161 and -13.266499161.

Subproblem 1

x + 20 = 13.266499161 Simplifying x + 20 = 13.266499161 Reorder the terms: 20 + x = 13.266499161 Solving 20 + x = 13.266499161 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 13.266499161 + -20 Combine like terms: 20 + -20 = 0 0 + x = 13.266499161 + -20 x = 13.266499161 + -20 Combine like terms: 13.266499161 + -20 = -6.733500839 x = -6.733500839 Simplifying x = -6.733500839

Subproblem 2

x + 20 = -13.266499161 Simplifying x + 20 = -13.266499161 Reorder the terms: 20 + x = -13.266499161 Solving 20 + x = -13.266499161 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = -13.266499161 + -20 Combine like terms: 20 + -20 = 0 0 + x = -13.266499161 + -20 x = -13.266499161 + -20 Combine like terms: -13.266499161 + -20 = -33.266499161 x = -33.266499161 Simplifying x = -33.266499161

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-6.733500839, -33.266499161}

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