8m^2+16m-47=4

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Solution for 8m^2+16m-47=4 equation:


Simplifying
8m2 + 16m + -47 = 4

Reorder the terms:
-47 + 16m + 8m2 = 4

Solving
-47 + 16m + 8m2 = 4

Solving for variable 'm'.

Reorder the terms:
-47 + -4 + 16m + 8m2 = 4 + -4

Combine like terms: -47 + -4 = -51
-51 + 16m + 8m2 = 4 + -4

Combine like terms: 4 + -4 = 0
-51 + 16m + 8m2 = 0

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

Divide each side by '8'.
-6.375 + 2m + m2 = 0

Move the constant term to the right:

Add '6.375' to each side of the equation.
-6.375 + 2m + 6.375 + m2 = 0 + 6.375

Reorder the terms:
-6.375 + 6.375 + 2m + m2 = 0 + 6.375

Combine like terms: -6.375 + 6.375 = 0.000
0.000 + 2m + m2 = 0 + 6.375
2m + m2 = 0 + 6.375

Combine like terms: 0 + 6.375 = 6.375
2m + m2 = 6.375

The m term is 2m.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2m + 1 + m2 = 6.375 + 1

Reorder the terms:
1 + 2m + m2 = 6.375 + 1

Combine like terms: 6.375 + 1 = 7.375
1 + 2m + m2 = 7.375

Factor a perfect square on the left side:
(m + 1)(m + 1) = 7.375

Calculate the square root of the right side: 2.715695123

Break this problem into two subproblems by setting 
(m + 1) equal to 2.715695123 and -2.715695123.

Subproblem 1

m + 1 = 2.715695123 Simplifying m + 1 = 2.715695123 Reorder the terms: 1 + m = 2.715695123 Solving 1 + m = 2.715695123 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + m = 2.715695123 + -1 Combine like terms: 1 + -1 = 0 0 + m = 2.715695123 + -1 m = 2.715695123 + -1 Combine like terms: 2.715695123 + -1 = 1.715695123 m = 1.715695123 Simplifying m = 1.715695123

Subproblem 2

m + 1 = -2.715695123 Simplifying m + 1 = -2.715695123 Reorder the terms: 1 + m = -2.715695123 Solving 1 + m = -2.715695123 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + m = -2.715695123 + -1 Combine like terms: 1 + -1 = 0 0 + m = -2.715695123 + -1 m = -2.715695123 + -1 Combine like terms: -2.715695123 + -1 = -3.715695123 m = -3.715695123 Simplifying m = -3.715695123

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.715695123, -3.715695123}

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