k^2-14k-63=0

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Solution for k^2-14k-63=0 equation:


Simplifying
k2 + -14k + -63 = 0

Reorder the terms:
-63 + -14k + k2 = 0

Solving
-63 + -14k + k2 = 0

Solving for variable 'k'.

Begin completing the square.

Move the constant term to the right:

Add '63' to each side of the equation.
-63 + -14k + 63 + k2 = 0 + 63

Reorder the terms:
-63 + 63 + -14k + k2 = 0 + 63

Combine like terms: -63 + 63 = 0
0 + -14k + k2 = 0 + 63
-14k + k2 = 0 + 63

Combine like terms: 0 + 63 = 63
-14k + k2 = 63

The k term is -14k.  Take half its coefficient (-7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
-14k + 49 + k2 = 63 + 49

Reorder the terms:
49 + -14k + k2 = 63 + 49

Combine like terms: 63 + 49 = 112
49 + -14k + k2 = 112

Factor a perfect square on the left side:
(k + -7)(k + -7) = 112

Calculate the square root of the right side: 10.583005244

Break this problem into two subproblems by setting 
(k + -7) equal to 10.583005244 and -10.583005244.

Subproblem 1

k + -7 = 10.583005244 Simplifying k + -7 = 10.583005244 Reorder the terms: -7 + k = 10.583005244 Solving -7 + k = 10.583005244 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + k = 10.583005244 + 7 Combine like terms: -7 + 7 = 0 0 + k = 10.583005244 + 7 k = 10.583005244 + 7 Combine like terms: 10.583005244 + 7 = 17.583005244 k = 17.583005244 Simplifying k = 17.583005244

Subproblem 2

k + -7 = -10.583005244 Simplifying k + -7 = -10.583005244 Reorder the terms: -7 + k = -10.583005244 Solving -7 + k = -10.583005244 Solving for variable 'k'. Move all terms containing k to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + k = -10.583005244 + 7 Combine like terms: -7 + 7 = 0 0 + k = -10.583005244 + 7 k = -10.583005244 + 7 Combine like terms: -10.583005244 + 7 = -3.583005244 k = -3.583005244 Simplifying k = -3.583005244

Solution

The solution to the problem is based on the solutions from the subproblems. k = {17.583005244, -3.583005244}

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