2+7x+7x+49-x^2+9x+9x+81=0

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Solution for 2+7x+7x+49-x^2+9x+9x+81=0 equation:


Simplifying
2 + 7x + 7x + 49 + -1x2 + 9x + 9x + 81 = 0

Reorder the terms:
2 + 49 + 81 + 7x + 7x + 9x + 9x + -1x2 = 0

Combine like terms: 2 + 49 = 51
51 + 81 + 7x + 7x + 9x + 9x + -1x2 = 0

Combine like terms: 51 + 81 = 132
132 + 7x + 7x + 9x + 9x + -1x2 = 0

Combine like terms: 7x + 7x = 14x
132 + 14x + 9x + 9x + -1x2 = 0

Combine like terms: 14x + 9x = 23x
132 + 23x + 9x + -1x2 = 0

Combine like terms: 23x + 9x = 32x
132 + 32x + -1x2 = 0

Solving
132 + 32x + -1x2 = 0

Solving for variable 'x'.

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

Divide each side by '-1'.
-132 + -32x + x2 = 0

Move the constant term to the right:

Add '132' to each side of the equation.
-132 + -32x + 132 + x2 = 0 + 132

Reorder the terms:
-132 + 132 + -32x + x2 = 0 + 132

Combine like terms: -132 + 132 = 0
0 + -32x + x2 = 0 + 132
-32x + x2 = 0 + 132

Combine like terms: 0 + 132 = 132
-32x + x2 = 132

The x term is -32x.  Take half its coefficient (-16).
Square it (256) and add it to both sides.

Add '256' to each side of the equation.
-32x + 256 + x2 = 132 + 256

Reorder the terms:
256 + -32x + x2 = 132 + 256

Combine like terms: 132 + 256 = 388
256 + -32x + x2 = 388

Factor a perfect square on the left side:
(x + -16)(x + -16) = 388

Calculate the square root of the right side: 19.697715604

Break this problem into two subproblems by setting 
(x + -16) equal to 19.697715604 and -19.697715604.

Subproblem 1

x + -16 = 19.697715604 Simplifying x + -16 = 19.697715604 Reorder the terms: -16 + x = 19.697715604 Solving -16 + x = 19.697715604 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = 19.697715604 + 16 Combine like terms: -16 + 16 = 0 0 + x = 19.697715604 + 16 x = 19.697715604 + 16 Combine like terms: 19.697715604 + 16 = 35.697715604 x = 35.697715604 Simplifying x = 35.697715604

Subproblem 2

x + -16 = -19.697715604 Simplifying x + -16 = -19.697715604 Reorder the terms: -16 + x = -19.697715604 Solving -16 + x = -19.697715604 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '16' to each side of the equation. -16 + 16 + x = -19.697715604 + 16 Combine like terms: -16 + 16 = 0 0 + x = -19.697715604 + 16 x = -19.697715604 + 16 Combine like terms: -19.697715604 + 16 = -3.697715604 x = -3.697715604 Simplifying x = -3.697715604

Solution

The solution to the problem is based on the solutions from the subproblems. x = {35.697715604, -3.697715604}

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