M^2+8M=3

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Solution for M^2+8M=3 equation:


Simplifying
M2 + 8M = 3

Reorder the terms:
8M + M2 = 3

Solving
8M + M2 = 3

Solving for variable 'M'.

Reorder the terms:
-3 + 8M + M2 = 3 + -3

Combine like terms: 3 + -3 = 0
-3 + 8M + M2 = 0

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 8M + 3 + M2 = 0 + 3

Reorder the terms:
-3 + 3 + 8M + M2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 8M + M2 = 0 + 3
8M + M2 = 0 + 3

Combine like terms: 0 + 3 = 3
8M + M2 = 3

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 = 3 + 16

Reorder the terms:
16 + 8M + M2 = 3 + 16

Combine like terms: 3 + 16 = 19
16 + 8M + M2 = 19

Factor a perfect square on the left side:
(M + 4)(M + 4) = 19

Calculate the square root of the right side: 4.358898944

Break this problem into two subproblems by setting 
(M + 4) equal to 4.358898944 and -4.358898944.

Subproblem 1

M + 4 = 4.358898944 Simplifying M + 4 = 4.358898944 Reorder the terms: 4 + M = 4.358898944 Solving 4 + M = 4.358898944 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 = 4.358898944 + -4 Combine like terms: 4 + -4 = 0 0 + M = 4.358898944 + -4 M = 4.358898944 + -4 Combine like terms: 4.358898944 + -4 = 0.358898944 M = 0.358898944 Simplifying M = 0.358898944

Subproblem 2

M + 4 = -4.358898944 Simplifying M + 4 = -4.358898944 Reorder the terms: 4 + M = -4.358898944 Solving 4 + M = -4.358898944 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 = -4.358898944 + -4 Combine like terms: 4 + -4 = 0 0 + M = -4.358898944 + -4 M = -4.358898944 + -4 Combine like terms: -4.358898944 + -4 = -8.358898944 M = -8.358898944 Simplifying M = -8.358898944

Solution

The solution to the problem is based on the solutions from the subproblems. M = {0.358898944, -8.358898944}

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