x(x+4)=149

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Solution for x(x+4)=149 equation:


Simplifying
x(x + 4) = 149

Reorder the terms:
x(4 + x) = 149
(4 * x + x * x) = 149
(4x + x2) = 149

Solving
4x + x2 = 149

Solving for variable 'x'.

Reorder the terms:
-149 + 4x + x2 = 149 + -149

Combine like terms: 149 + -149 = 0
-149 + 4x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '149' to each side of the equation.
-149 + 4x + 149 + x2 = 0 + 149

Reorder the terms:
-149 + 149 + 4x + x2 = 0 + 149

Combine like terms: -149 + 149 = 0
0 + 4x + x2 = 0 + 149
4x + x2 = 0 + 149

Combine like terms: 0 + 149 = 149
4x + x2 = 149

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 = 149 + 4

Reorder the terms:
4 + 4x + x2 = 149 + 4

Combine like terms: 149 + 4 = 153
4 + 4x + x2 = 153

Factor a perfect square on the left side:
(x + 2)(x + 2) = 153

Calculate the square root of the right side: 12.369316877

Break this problem into two subproblems by setting 
(x + 2) equal to 12.369316877 and -12.369316877.

Subproblem 1

x + 2 = 12.369316877 Simplifying x + 2 = 12.369316877 Reorder the terms: 2 + x = 12.369316877 Solving 2 + x = 12.369316877 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 = 12.369316877 + -2 Combine like terms: 2 + -2 = 0 0 + x = 12.369316877 + -2 x = 12.369316877 + -2 Combine like terms: 12.369316877 + -2 = 10.369316877 x = 10.369316877 Simplifying x = 10.369316877

Subproblem 2

x + 2 = -12.369316877 Simplifying x + 2 = -12.369316877 Reorder the terms: 2 + x = -12.369316877 Solving 2 + x = -12.369316877 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 = -12.369316877 + -2 Combine like terms: 2 + -2 = 0 0 + x = -12.369316877 + -2 x = -12.369316877 + -2 Combine like terms: -12.369316877 + -2 = -14.369316877 x = -14.369316877 Simplifying x = -14.369316877

Solution

The solution to the problem is based on the solutions from the subproblems. x = {10.369316877, -14.369316877}

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