m^2-8m-80=

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Solution for m^2-8m-80= equation:


Simplifying
m2 + -8m + -80 = 0

Reorder the terms:
-80 + -8m + m2 = 0

Solving
-80 + -8m + m2 = 0

Solving for variable 'm'.

Begin completing the square.

Move the constant term to the right:

Add '80' to each side of the equation.
-80 + -8m + 80 + m2 = 0 + 80

Reorder the terms:
-80 + 80 + -8m + m2 = 0 + 80

Combine like terms: -80 + 80 = 0
0 + -8m + m2 = 0 + 80
-8m + m2 = 0 + 80

Combine like terms: 0 + 80 = 80
-8m + m2 = 80

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 = 80 + 16

Reorder the terms:
16 + -8m + m2 = 80 + 16

Combine like terms: 80 + 16 = 96
16 + -8m + m2 = 96

Factor a perfect square on the left side:
(m + -4)(m + -4) = 96

Calculate the square root of the right side: 9.797958971

Break this problem into two subproblems by setting 
(m + -4) equal to 9.797958971 and -9.797958971.

Subproblem 1

m + -4 = 9.797958971 Simplifying m + -4 = 9.797958971 Reorder the terms: -4 + m = 9.797958971 Solving -4 + m = 9.797958971 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 = 9.797958971 + 4 Combine like terms: -4 + 4 = 0 0 + m = 9.797958971 + 4 m = 9.797958971 + 4 Combine like terms: 9.797958971 + 4 = 13.797958971 m = 13.797958971 Simplifying m = 13.797958971

Subproblem 2

m + -4 = -9.797958971 Simplifying m + -4 = -9.797958971 Reorder the terms: -4 + m = -9.797958971 Solving -4 + m = -9.797958971 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 = -9.797958971 + 4 Combine like terms: -4 + 4 = 0 0 + m = -9.797958971 + 4 m = -9.797958971 + 4 Combine like terms: -9.797958971 + 4 = -5.797958971 m = -5.797958971 Simplifying m = -5.797958971

Solution

The solution to the problem is based on the solutions from the subproblems. m = {13.797958971, -5.797958971}

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