(n^2-n-70)=0

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Solution for (n^2-n-70)=0 equation:


Simplifying
(n2 + -1n + -70) = 0

Reorder the terms:
(-70 + -1n + n2) = 0

Remove parenthesis around (-70 + -1n + n2)
-70 + -1n + n2 = 0

Solving
-70 + -1n + n2 = 0

Solving for variable 'n'.

Begin completing the square.

Move the constant term to the right:

Add '70' to each side of the equation.
-70 + -1n + 70 + n2 = 0 + 70

Reorder the terms:
-70 + 70 + -1n + n2 = 0 + 70

Combine like terms: -70 + 70 = 0
0 + -1n + n2 = 0 + 70
-1n + n2 = 0 + 70

Combine like terms: 0 + 70 = 70
-1n + n2 = 70

The n term is -1n.  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.
-1n + 0.25 + n2 = 70 + 0.25

Reorder the terms:
0.25 + -1n + n2 = 70 + 0.25

Combine like terms: 70 + 0.25 = 70.25
0.25 + -1n + n2 = 70.25

Factor a perfect square on the left side:
(n + -0.5)(n + -0.5) = 70.25

Calculate the square root of the right side: 8.381527307

Break this problem into two subproblems by setting 
(n + -0.5) equal to 8.381527307 and -8.381527307.

Subproblem 1

n + -0.5 = 8.381527307 Simplifying n + -0.5 = 8.381527307 Reorder the terms: -0.5 + n = 8.381527307 Solving -0.5 + n = 8.381527307 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + n = 8.381527307 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = 8.381527307 + 0.5 n = 8.381527307 + 0.5 Combine like terms: 8.381527307 + 0.5 = 8.881527307 n = 8.881527307 Simplifying n = 8.881527307

Subproblem 2

n + -0.5 = -8.381527307 Simplifying n + -0.5 = -8.381527307 Reorder the terms: -0.5 + n = -8.381527307 Solving -0.5 + n = -8.381527307 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + n = -8.381527307 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + n = -8.381527307 + 0.5 n = -8.381527307 + 0.5 Combine like terms: -8.381527307 + 0.5 = -7.881527307 n = -7.881527307 Simplifying n = -7.881527307

Solution

The solution to the problem is based on the solutions from the subproblems. n = {8.881527307, -7.881527307}

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