x^2+7x-1296=0

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Solution for x^2+7x-1296=0 equation:


Simplifying
x2 + 7x + -1296 = 0

Reorder the terms:
-1296 + 7x + x2 = 0

Solving
-1296 + 7x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1296' to each side of the equation.
-1296 + 7x + 1296 + x2 = 0 + 1296

Reorder the terms:
-1296 + 1296 + 7x + x2 = 0 + 1296

Combine like terms: -1296 + 1296 = 0
0 + 7x + x2 = 0 + 1296
7x + x2 = 0 + 1296

Combine like terms: 0 + 1296 = 1296
7x + x2 = 1296

The x term is 7x.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7x + 12.25 + x2 = 1296 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 1296 + 12.25

Combine like terms: 1296 + 12.25 = 1308.25
12.25 + 7x + x2 = 1308.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 1308.25

Calculate the square root of the right side: 36.169738733

Break this problem into two subproblems by setting 
(x + 3.5) equal to 36.169738733 and -36.169738733.

Subproblem 1

x + 3.5 = 36.169738733 Simplifying x + 3.5 = 36.169738733 Reorder the terms: 3.5 + x = 36.169738733 Solving 3.5 + x = 36.169738733 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 36.169738733 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 36.169738733 + -3.5 x = 36.169738733 + -3.5 Combine like terms: 36.169738733 + -3.5 = 32.669738733 x = 32.669738733 Simplifying x = 32.669738733

Subproblem 2

x + 3.5 = -36.169738733 Simplifying x + 3.5 = -36.169738733 Reorder the terms: 3.5 + x = -36.169738733 Solving 3.5 + x = -36.169738733 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -36.169738733 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -36.169738733 + -3.5 x = -36.169738733 + -3.5 Combine like terms: -36.169738733 + -3.5 = -39.669738733 x = -39.669738733 Simplifying x = -39.669738733

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.669738733, -39.669738733}

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