m^2-8m-8=0

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


Simplifying
m2 + -8m + -8 = 0

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

Solving
-8 + -8m + m2 = 0

Solving for variable 'm'.

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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 = 8 + 16

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

Combine like terms: 8 + 16 = 24
16 + -8m + m2 = 24

Factor a perfect square on the left side:
(m + -4)(m + -4) = 24

Calculate the square root of the right side: 4.898979486

Break this problem into two subproblems by setting 
(m + -4) equal to 4.898979486 and -4.898979486.

Subproblem 1

m + -4 = 4.898979486 Simplifying m + -4 = 4.898979486 Reorder the terms: -4 + m = 4.898979486 Solving -4 + m = 4.898979486 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 = 4.898979486 + 4 Combine like terms: -4 + 4 = 0 0 + m = 4.898979486 + 4 m = 4.898979486 + 4 Combine like terms: 4.898979486 + 4 = 8.898979486 m = 8.898979486 Simplifying m = 8.898979486

Subproblem 2

m + -4 = -4.898979486 Simplifying m + -4 = -4.898979486 Reorder the terms: -4 + m = -4.898979486 Solving -4 + m = -4.898979486 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 = -4.898979486 + 4 Combine like terms: -4 + 4 = 0 0 + m = -4.898979486 + 4 m = -4.898979486 + 4 Combine like terms: -4.898979486 + 4 = -0.898979486 m = -0.898979486 Simplifying m = -0.898979486

Solution

The solution to the problem is based on the solutions from the subproblems. m = {8.898979486, -0.898979486}

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