m^2-8m-27=0

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Solution for m^2-8m-27=0 equation:


Simplifying
m2 + -8m + -27 = 0

Reorder the terms:
-27 + -8m + m2 = 0

Solving
-27 + -8m + m2 = 0

Solving for variable 'm'.

Begin completing the square.

Move the constant term to the right:

Add '27' to each side of the equation.
-27 + -8m + 27 + m2 = 0 + 27

Reorder the terms:
-27 + 27 + -8m + m2 = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -8m + m2 = 0 + 27
-8m + m2 = 0 + 27

Combine like terms: 0 + 27 = 27
-8m + m2 = 27

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 = 27 + 16

Reorder the terms:
16 + -8m + m2 = 27 + 16

Combine like terms: 27 + 16 = 43
16 + -8m + m2 = 43

Factor a perfect square on the left side:
(m + -4)(m + -4) = 43

Calculate the square root of the right side: 6.557438524

Break this problem into two subproblems by setting 
(m + -4) equal to 6.557438524 and -6.557438524.

Subproblem 1

m + -4 = 6.557438524 Simplifying m + -4 = 6.557438524 Reorder the terms: -4 + m = 6.557438524 Solving -4 + m = 6.557438524 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 = 6.557438524 + 4 Combine like terms: -4 + 4 = 0 0 + m = 6.557438524 + 4 m = 6.557438524 + 4 Combine like terms: 6.557438524 + 4 = 10.557438524 m = 10.557438524 Simplifying m = 10.557438524

Subproblem 2

m + -4 = -6.557438524 Simplifying m + -4 = -6.557438524 Reorder the terms: -4 + m = -6.557438524 Solving -4 + m = -6.557438524 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 = -6.557438524 + 4 Combine like terms: -4 + 4 = 0 0 + m = -6.557438524 + 4 m = -6.557438524 + 4 Combine like terms: -6.557438524 + 4 = -2.557438524 m = -2.557438524 Simplifying m = -2.557438524

Solution

The solution to the problem is based on the solutions from the subproblems. m = {10.557438524, -2.557438524}

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