144=x^2+16x

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Solution for 144=x^2+16x equation:


Simplifying
144 = x2 + 16x

Reorder the terms:
144 = 16x + x2

Solving
144 = 16x + x2

Solving for variable 'x'.

Reorder the terms:
144 + -16x + -1x2 = 16x + -16x + x2 + -1x2

Combine like terms: 16x + -16x = 0
144 + -16x + -1x2 = 0 + x2 + -1x2
144 + -16x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
144 + -16x + -1x2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-144 + 16x + x2 = 0

Move the constant term to the right:

Add '144' to each side of the equation.
-144 + 16x + 144 + x2 = 0 + 144

Reorder the terms:
-144 + 144 + 16x + x2 = 0 + 144

Combine like terms: -144 + 144 = 0
0 + 16x + x2 = 0 + 144
16x + x2 = 0 + 144

Combine like terms: 0 + 144 = 144
16x + x2 = 144

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = 144 + 64

Reorder the terms:
64 + 16x + x2 = 144 + 64

Combine like terms: 144 + 64 = 208
64 + 16x + x2 = 208

Factor a perfect square on the left side:
(x + 8)(x + 8) = 208

Calculate the square root of the right side: 14.422205102

Break this problem into two subproblems by setting 
(x + 8) equal to 14.422205102 and -14.422205102.

Subproblem 1

x + 8 = 14.422205102 Simplifying x + 8 = 14.422205102 Reorder the terms: 8 + x = 14.422205102 Solving 8 + x = 14.422205102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 14.422205102 + -8 Combine like terms: 8 + -8 = 0 0 + x = 14.422205102 + -8 x = 14.422205102 + -8 Combine like terms: 14.422205102 + -8 = 6.422205102 x = 6.422205102 Simplifying x = 6.422205102

Subproblem 2

x + 8 = -14.422205102 Simplifying x + 8 = -14.422205102 Reorder the terms: 8 + x = -14.422205102 Solving 8 + x = -14.422205102 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -14.422205102 + -8 Combine like terms: 8 + -8 = 0 0 + x = -14.422205102 + -8 x = -14.422205102 + -8 Combine like terms: -14.422205102 + -8 = -22.422205102 x = -22.422205102 Simplifying x = -22.422205102

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.422205102, -22.422205102}

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