N^2-10N-25=0

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Solution for N^2-10N-25=0 equation:


Simplifying
N2 + -10N + -25 = 0

Reorder the terms:
-25 + -10N + N2 = 0

Solving
-25 + -10N + 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 + -10N + 25 + N2 = 0 + 25

Reorder the terms:
-25 + 25 + -10N + N2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + -10N + N2 = 0 + 25
-10N + N2 = 0 + 25

Combine like terms: 0 + 25 = 25
-10N + N2 = 25

The N term is -10N.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10N + 25 + N2 = 25 + 25

Reorder the terms:
25 + -10N + N2 = 25 + 25

Combine like terms: 25 + 25 = 50
25 + -10N + N2 = 50

Factor a perfect square on the left side:
(N + -5)(N + -5) = 50

Calculate the square root of the right side: 7.071067812

Break this problem into two subproblems by setting 
(N + -5) equal to 7.071067812 and -7.071067812.

Subproblem 1

N + -5 = 7.071067812 Simplifying N + -5 = 7.071067812 Reorder the terms: -5 + N = 7.071067812 Solving -5 + N = 7.071067812 Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + N = 7.071067812 + 5 Combine like terms: -5 + 5 = 0 0 + N = 7.071067812 + 5 N = 7.071067812 + 5 Combine like terms: 7.071067812 + 5 = 12.071067812 N = 12.071067812 Simplifying N = 12.071067812

Subproblem 2

N + -5 = -7.071067812 Simplifying N + -5 = -7.071067812 Reorder the terms: -5 + N = -7.071067812 Solving -5 + N = -7.071067812 Solving for variable 'N'. Move all terms containing N to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + N = -7.071067812 + 5 Combine like terms: -5 + 5 = 0 0 + N = -7.071067812 + 5 N = -7.071067812 + 5 Combine like terms: -7.071067812 + 5 = -2.071067812 N = -2.071067812 Simplifying N = -2.071067812

Solution

The solution to the problem is based on the solutions from the subproblems. N = {12.071067812, -2.071067812}

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