n^2+2n-25=0

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Solution for n^2+2n-25=0 equation:


Simplifying
n2 + 2n + -25 = 0

Reorder the terms:
-25 + 2n + n2 = 0

Solving
-25 + 2n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 2n + 25 + n2 = 0 + 25

Reorder the terms:
-25 + 25 + 2n + n2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 2n + n2 = 0 + 25
2n + n2 = 0 + 25

Combine like terms: 0 + 25 = 25
2n + n2 = 25

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

Add '1' to each side of the equation.
2n + 1 + n2 = 25 + 1

Reorder the terms:
1 + 2n + n2 = 25 + 1

Combine like terms: 25 + 1 = 26
1 + 2n + n2 = 26

Factor a perfect square on the left side:
(n + 1)(n + 1) = 26

Calculate the square root of the right side: 5.099019514

Break this problem into two subproblems by setting 
(n + 1) equal to 5.099019514 and -5.099019514.

Subproblem 1

n + 1 = 5.099019514 Simplifying n + 1 = 5.099019514 Reorder the terms: 1 + n = 5.099019514 Solving 1 + n = 5.099019514 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = 5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + n = 5.099019514 + -1 n = 5.099019514 + -1 Combine like terms: 5.099019514 + -1 = 4.099019514 n = 4.099019514 Simplifying n = 4.099019514

Subproblem 2

n + 1 = -5.099019514 Simplifying n + 1 = -5.099019514 Reorder the terms: 1 + n = -5.099019514 Solving 1 + n = -5.099019514 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + n = -5.099019514 + -1 Combine like terms: 1 + -1 = 0 0 + n = -5.099019514 + -1 n = -5.099019514 + -1 Combine like terms: -5.099019514 + -1 = -6.099019514 n = -6.099019514 Simplifying n = -6.099019514

Solution

The solution to the problem is based on the solutions from the subproblems. n = {4.099019514, -6.099019514}

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