x^2+x-1220=0

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Solution for x^2+x-1220=0 equation:


Simplifying
x2 + x + -1220 = 0

Reorder the terms:
-1220 + x + x2 = 0

Solving
-1220 + x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '1220' to each side of the equation.
-1220 + x + 1220 + x2 = 0 + 1220

Reorder the terms:
-1220 + 1220 + x + x2 = 0 + 1220

Combine like terms: -1220 + 1220 = 0
0 + x + x2 = 0 + 1220
x + x2 = 0 + 1220

Combine like terms: 0 + 1220 = 1220
x + x2 = 1220

The x term is x.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
x + 0.25 + x2 = 1220 + 0.25

Reorder the terms:
0.25 + x + x2 = 1220 + 0.25

Combine like terms: 1220 + 0.25 = 1220.25
0.25 + x + x2 = 1220.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 1220.25

Calculate the square root of the right side: 34.932076949

Break this problem into two subproblems by setting 
(x + 0.5) equal to 34.932076949 and -34.932076949.

Subproblem 1

x + 0.5 = 34.932076949 Simplifying x + 0.5 = 34.932076949 Reorder the terms: 0.5 + x = 34.932076949 Solving 0.5 + x = 34.932076949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 34.932076949 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 34.932076949 + -0.5 x = 34.932076949 + -0.5 Combine like terms: 34.932076949 + -0.5 = 34.432076949 x = 34.432076949 Simplifying x = 34.432076949

Subproblem 2

x + 0.5 = -34.932076949 Simplifying x + 0.5 = -34.932076949 Reorder the terms: 0.5 + x = -34.932076949 Solving 0.5 + x = -34.932076949 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -34.932076949 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -34.932076949 + -0.5 x = -34.932076949 + -0.5 Combine like terms: -34.932076949 + -0.5 = -35.432076949 x = -35.432076949 Simplifying x = -35.432076949

Solution

The solution to the problem is based on the solutions from the subproblems. x = {34.432076949, -35.432076949}

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