M^2-2M-3=5

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Solution for M^2-2M-3=5 equation:


Simplifying
M2 + -2M + -3 = 5

Reorder the terms:
-3 + -2M + M2 = 5

Solving
-3 + -2M + M2 = 5

Solving for variable 'M'.

Reorder the terms:
-3 + -5 + -2M + M2 = 5 + -5

Combine like terms: -3 + -5 = -8
-8 + -2M + M2 = 5 + -5

Combine like terms: 5 + -5 = 0
-8 + -2M + M2 = 0

Factor a trinomial.
(-2 + -1M)(4 + -1M) = 0

Subproblem 1

Set the factor '(-2 + -1M)' equal to zero and attempt to solve: Simplifying -2 + -1M = 0 Solving -2 + -1M = 0 Move all terms containing M to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -1M = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -1M = 0 + 2 -1M = 0 + 2 Combine like terms: 0 + 2 = 2 -1M = 2 Divide each side by '-1'. M = -2 Simplifying M = -2

Subproblem 2

Set the factor '(4 + -1M)' equal to zero and attempt to solve: Simplifying 4 + -1M = 0 Solving 4 + -1M = 0 Move all terms containing M to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + -1M = 0 + -4 Combine like terms: 4 + -4 = 0 0 + -1M = 0 + -4 -1M = 0 + -4 Combine like terms: 0 + -4 = -4 -1M = -4 Divide each side by '-1'. M = 4 Simplifying M = 4

Solution

M = {-2, 4}

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