x^2+2x-875=0

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Solution for x^2+2x-875=0 equation:


Simplifying
x2 + 2x + -875 = 0

Reorder the terms:
-875 + 2x + x2 = 0

Solving
-875 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '875' to each side of the equation.
-875 + 2x + 875 + x2 = 0 + 875

Reorder the terms:
-875 + 875 + 2x + x2 = 0 + 875

Combine like terms: -875 + 875 = 0
0 + 2x + x2 = 0 + 875
2x + x2 = 0 + 875

Combine like terms: 0 + 875 = 875
2x + x2 = 875

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 875 + 1

Reorder the terms:
1 + 2x + x2 = 875 + 1

Combine like terms: 875 + 1 = 876
1 + 2x + x2 = 876

Factor a perfect square on the left side:
(x + 1)(x + 1) = 876

Calculate the square root of the right side: 29.597297174

Break this problem into two subproblems by setting 
(x + 1) equal to 29.597297174 and -29.597297174.

Subproblem 1

x + 1 = 29.597297174 Simplifying x + 1 = 29.597297174 Reorder the terms: 1 + x = 29.597297174 Solving 1 + x = 29.597297174 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 29.597297174 + -1 Combine like terms: 1 + -1 = 0 0 + x = 29.597297174 + -1 x = 29.597297174 + -1 Combine like terms: 29.597297174 + -1 = 28.597297174 x = 28.597297174 Simplifying x = 28.597297174

Subproblem 2

x + 1 = -29.597297174 Simplifying x + 1 = -29.597297174 Reorder the terms: 1 + x = -29.597297174 Solving 1 + x = -29.597297174 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -29.597297174 + -1 Combine like terms: 1 + -1 = 0 0 + x = -29.597297174 + -1 x = -29.597297174 + -1 Combine like terms: -29.597297174 + -1 = -30.597297174 x = -30.597297174 Simplifying x = -30.597297174

Solution

The solution to the problem is based on the solutions from the subproblems. x = {28.597297174, -30.597297174}

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