x^2+2x=5625

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Solution for x^2+2x=5625 equation:


Simplifying
x2 + 2x = 5625

Reorder the terms:
2x + x2 = 5625

Solving
2x + x2 = 5625

Solving for variable 'x'.

Reorder the terms:
-5625 + 2x + x2 = 5625 + -5625

Combine like terms: 5625 + -5625 = 0
-5625 + 2x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '5625' to each side of the equation.
-5625 + 2x + 5625 + x2 = 0 + 5625

Reorder the terms:
-5625 + 5625 + 2x + x2 = 0 + 5625

Combine like terms: -5625 + 5625 = 0
0 + 2x + x2 = 0 + 5625
2x + x2 = 0 + 5625

Combine like terms: 0 + 5625 = 5625
2x + x2 = 5625

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 = 5625 + 1

Reorder the terms:
1 + 2x + x2 = 5625 + 1

Combine like terms: 5625 + 1 = 5626
1 + 2x + x2 = 5626

Factor a perfect square on the left side:
(x + 1)(x + 1) = 5626

Calculate the square root of the right side: 75.00666637

Break this problem into two subproblems by setting 
(x + 1) equal to 75.00666637 and -75.00666637.

Subproblem 1

x + 1 = 75.00666637 Simplifying x + 1 = 75.00666637 Reorder the terms: 1 + x = 75.00666637 Solving 1 + x = 75.00666637 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 = 75.00666637 + -1 Combine like terms: 1 + -1 = 0 0 + x = 75.00666637 + -1 x = 75.00666637 + -1 Combine like terms: 75.00666637 + -1 = 74.00666637 x = 74.00666637 Simplifying x = 74.00666637

Subproblem 2

x + 1 = -75.00666637 Simplifying x + 1 = -75.00666637 Reorder the terms: 1 + x = -75.00666637 Solving 1 + x = -75.00666637 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 = -75.00666637 + -1 Combine like terms: 1 + -1 = 0 0 + x = -75.00666637 + -1 x = -75.00666637 + -1 Combine like terms: -75.00666637 + -1 = -76.00666637 x = -76.00666637 Simplifying x = -76.00666637

Solution

The solution to the problem is based on the solutions from the subproblems. x = {74.00666637, -76.00666637}

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