8n^2-53n-56=

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Solution for 8n^2-53n-56= equation:


Simplifying
8n2 + -53n + -56 = 0

Reorder the terms:
-56 + -53n + 8n2 = 0

Solving
-56 + -53n + 8n2 = 0

Solving for variable 'n'.

Begin completing the square.  Divide all terms by
8 the coefficient of the squared term: 

Divide each side by '8'.
-7 + -6.625n + n2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -6.625n + 7 + n2 = 0 + 7

Reorder the terms:
-7 + 7 + -6.625n + n2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -6.625n + n2 = 0 + 7
-6.625n + n2 = 0 + 7

Combine like terms: 0 + 7 = 7
-6.625n + n2 = 7

The n term is -6.625n.  Take half its coefficient (-3.3125).
Square it (10.97265625) and add it to both sides.

Add '10.97265625' to each side of the equation.
-6.625n + 10.97265625 + n2 = 7 + 10.97265625

Reorder the terms:
10.97265625 + -6.625n + n2 = 7 + 10.97265625

Combine like terms: 7 + 10.97265625 = 17.97265625
10.97265625 + -6.625n + n2 = 17.97265625

Factor a perfect square on the left side:
(n + -3.3125)(n + -3.3125) = 17.97265625

Calculate the square root of the right side: 4.239416971

Break this problem into two subproblems by setting 
(n + -3.3125) equal to 4.239416971 and -4.239416971.

Subproblem 1

n + -3.3125 = 4.239416971 Simplifying n + -3.3125 = 4.239416971 Reorder the terms: -3.3125 + n = 4.239416971 Solving -3.3125 + n = 4.239416971 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.3125' to each side of the equation. -3.3125 + 3.3125 + n = 4.239416971 + 3.3125 Combine like terms: -3.3125 + 3.3125 = 0.0000 0.0000 + n = 4.239416971 + 3.3125 n = 4.239416971 + 3.3125 Combine like terms: 4.239416971 + 3.3125 = 7.551916971 n = 7.551916971 Simplifying n = 7.551916971

Subproblem 2

n + -3.3125 = -4.239416971 Simplifying n + -3.3125 = -4.239416971 Reorder the terms: -3.3125 + n = -4.239416971 Solving -3.3125 + n = -4.239416971 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3.3125' to each side of the equation. -3.3125 + 3.3125 + n = -4.239416971 + 3.3125 Combine like terms: -3.3125 + 3.3125 = 0.0000 0.0000 + n = -4.239416971 + 3.3125 n = -4.239416971 + 3.3125 Combine like terms: -4.239416971 + 3.3125 = -0.926916971 n = -0.926916971 Simplifying n = -0.926916971

Solution

The solution to the problem is based on the solutions from the subproblems. n = {7.551916971, -0.926916971}

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