x^2+7x-1260=0

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Solution for x^2+7x-1260=0 equation:


Simplifying
x2 + 7x + -1260 = 0

Reorder the terms:
-1260 + 7x + x2 = 0

Solving
-1260 + 7x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1260' to each side of the equation.
-1260 + 7x + 1260 + x2 = 0 + 1260

Reorder the terms:
-1260 + 1260 + 7x + x2 = 0 + 1260

Combine like terms: -1260 + 1260 = 0
0 + 7x + x2 = 0 + 1260
7x + x2 = 0 + 1260

Combine like terms: 0 + 1260 = 1260
7x + x2 = 1260

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 = 1260 + 12.25

Reorder the terms:
12.25 + 7x + x2 = 1260 + 12.25

Combine like terms: 1260 + 12.25 = 1272.25
12.25 + 7x + x2 = 1272.25

Factor a perfect square on the left side:
(x + 3.5)(x + 3.5) = 1272.25

Calculate the square root of the right side: 35.668613654

Break this problem into two subproblems by setting 
(x + 3.5) equal to 35.668613654 and -35.668613654.

Subproblem 1

x + 3.5 = 35.668613654 Simplifying x + 3.5 = 35.668613654 Reorder the terms: 3.5 + x = 35.668613654 Solving 3.5 + x = 35.668613654 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 = 35.668613654 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 35.668613654 + -3.5 x = 35.668613654 + -3.5 Combine like terms: 35.668613654 + -3.5 = 32.168613654 x = 32.168613654 Simplifying x = 32.168613654

Subproblem 2

x + 3.5 = -35.668613654 Simplifying x + 3.5 = -35.668613654 Reorder the terms: 3.5 + x = -35.668613654 Solving 3.5 + x = -35.668613654 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 = -35.668613654 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -35.668613654 + -3.5 x = -35.668613654 + -3.5 Combine like terms: -35.668613654 + -3.5 = -39.168613654 x = -39.168613654 Simplifying x = -39.168613654

Solution

The solution to the problem is based on the solutions from the subproblems. x = {32.168613654, -39.168613654}

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