m^2-8m-23=0

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Solution for m^2-8m-23=0 equation:


Simplifying
m2 + -8m + -23 = 0

Reorder the terms:
-23 + -8m + m2 = 0

Solving
-23 + -8m + m2 = 0

Solving for variable 'm'.

Begin completing the square.

Move the constant term to the right:

Add '23' to each side of the equation.
-23 + -8m + 23 + m2 = 0 + 23

Reorder the terms:
-23 + 23 + -8m + m2 = 0 + 23

Combine like terms: -23 + 23 = 0
0 + -8m + m2 = 0 + 23
-8m + m2 = 0 + 23

Combine like terms: 0 + 23 = 23
-8m + m2 = 23

The m term is -8m.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8m + 16 + m2 = 23 + 16

Reorder the terms:
16 + -8m + m2 = 23 + 16

Combine like terms: 23 + 16 = 39
16 + -8m + m2 = 39

Factor a perfect square on the left side:
(m + -4)(m + -4) = 39

Calculate the square root of the right side: 6.244997998

Break this problem into two subproblems by setting 
(m + -4) equal to 6.244997998 and -6.244997998.

Subproblem 1

m + -4 = 6.244997998 Simplifying m + -4 = 6.244997998 Reorder the terms: -4 + m = 6.244997998 Solving -4 + m = 6.244997998 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + m = 6.244997998 + 4 Combine like terms: -4 + 4 = 0 0 + m = 6.244997998 + 4 m = 6.244997998 + 4 Combine like terms: 6.244997998 + 4 = 10.244997998 m = 10.244997998 Simplifying m = 10.244997998

Subproblem 2

m + -4 = -6.244997998 Simplifying m + -4 = -6.244997998 Reorder the terms: -4 + m = -6.244997998 Solving -4 + m = -6.244997998 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + m = -6.244997998 + 4 Combine like terms: -4 + 4 = 0 0 + m = -6.244997998 + 4 m = -6.244997998 + 4 Combine like terms: -6.244997998 + 4 = -2.244997998 m = -2.244997998 Simplifying m = -2.244997998

Solution

The solution to the problem is based on the solutions from the subproblems. m = {10.244997998, -2.244997998}

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