8m^2+4m-16=-m^2

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Solution for 8m^2+4m-16=-m^2 equation:


Simplifying
8m2 + 4m + -16 = -1m2

Reorder the terms:
-16 + 4m + 8m2 = -1m2

Solving
-16 + 4m + 8m2 = -1m2

Solving for variable 'm'.

Combine like terms: 8m2 + m2 = 9m2
-16 + 4m + 9m2 = -1m2 + m2

Combine like terms: -1m2 + m2 = 0
-16 + 4m + 9m2 = 0

Begin completing the square.  Divide all terms by
9 the coefficient of the squared term: 

Divide each side by '9'.
-1.777777778 + 0.4444444444m + m2 = 0

Move the constant term to the right:

Add '1.777777778' to each side of the equation.
-1.777777778 + 0.4444444444m + 1.777777778 + m2 = 0 + 1.777777778

Reorder the terms:
-1.777777778 + 1.777777778 + 0.4444444444m + m2 = 0 + 1.777777778

Combine like terms: -1.777777778 + 1.777777778 = 0.000000000
0.000000000 + 0.4444444444m + m2 = 0 + 1.777777778
0.4444444444m + m2 = 0 + 1.777777778

Combine like terms: 0 + 1.777777778 = 1.777777778
0.4444444444m + m2 = 1.777777778

The m term is 0.4444444444m.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444m + 0.04938271604 + m2 = 1.777777778 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444m + m2 = 1.777777778 + 0.04938271604

Combine like terms: 1.777777778 + 0.04938271604 = 1.82716049404
0.04938271604 + 0.4444444444m + m2 = 1.82716049404

Factor a perfect square on the left side:
(m + 0.2222222222)(m + 0.2222222222) = 1.82716049404

Calculate the square root of the right side: 1.351725007

Break this problem into two subproblems by setting 
(m + 0.2222222222) equal to 1.351725007 and -1.351725007.

Subproblem 1

m + 0.2222222222 = 1.351725007 Simplifying m + 0.2222222222 = 1.351725007 Reorder the terms: 0.2222222222 + m = 1.351725007 Solving 0.2222222222 + m = 1.351725007 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + m = 1.351725007 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + m = 1.351725007 + -0.2222222222 m = 1.351725007 + -0.2222222222 Combine like terms: 1.351725007 + -0.2222222222 = 1.1295027848 m = 1.1295027848 Simplifying m = 1.1295027848

Subproblem 2

m + 0.2222222222 = -1.351725007 Simplifying m + 0.2222222222 = -1.351725007 Reorder the terms: 0.2222222222 + m = -1.351725007 Solving 0.2222222222 + m = -1.351725007 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + m = -1.351725007 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + m = -1.351725007 + -0.2222222222 m = -1.351725007 + -0.2222222222 Combine like terms: -1.351725007 + -0.2222222222 = -1.5739472292 m = -1.5739472292 Simplifying m = -1.5739472292

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.1295027848, -1.5739472292}

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