M^4=81

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Solution for M^4=81 equation:


Simplifying
M4 = 81

Solving
M4 = 81

Solving for variable 'M'.

Move all terms containing M to the left, all other terms to the right.

Simplifying
M4 = 81

Reorder the terms:
-81 + M4 = 81 + -81

Combine like terms: 81 + -81 = 0
-81 + M4 = 0

Factor a difference between two squares.
(9 + M2)(-9 + M2) = 0

Factor a difference between two squares.
(9 + M2)((3 + M)(-3 + M)) = 0

Subproblem 1

Set the factor '(9 + M2)' equal to zero and attempt to solve: Simplifying 9 + M2 = 0 Solving 9 + M2 = 0 Move all terms containing M to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + M2 = 0 + -9 Combine like terms: 9 + -9 = 0 0 + M2 = 0 + -9 M2 = 0 + -9 Combine like terms: 0 + -9 = -9 M2 = -9 Simplifying M2 = -9 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(3 + M)' equal to zero and attempt to solve: Simplifying 3 + M = 0 Solving 3 + M = 0 Move all terms containing M to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + M = 0 + -3 Combine like terms: 3 + -3 = 0 0 + M = 0 + -3 M = 0 + -3 Combine like terms: 0 + -3 = -3 M = -3 Simplifying M = -3

Subproblem 3

Set the factor '(-3 + M)' equal to zero and attempt to solve: Simplifying -3 + M = 0 Solving -3 + M = 0 Move all terms containing M to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + M = 0 + 3 Combine like terms: -3 + 3 = 0 0 + M = 0 + 3 M = 0 + 3 Combine like terms: 0 + 3 = 3 M = 3 Simplifying M = 3

Solution

M = {-3, 3}

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