8m^2+2m=7

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Solution for 8m^2+2m=7 equation:


Simplifying
8m2 + 2m = 7

Reorder the terms:
2m + 8m2 = 7

Solving
2m + 8m2 = 7

Solving for variable 'm'.

Reorder the terms:
-7 + 2m + 8m2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 2m + 8m2 = 0

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

Divide each side by '8'.
-0.875 + 0.25m + m2 = 0

Move the constant term to the right:

Add '0.875' to each side of the equation.
-0.875 + 0.25m + 0.875 + m2 = 0 + 0.875

Reorder the terms:
-0.875 + 0.875 + 0.25m + m2 = 0 + 0.875

Combine like terms: -0.875 + 0.875 = 0.000
0.000 + 0.25m + m2 = 0 + 0.875
0.25m + m2 = 0 + 0.875

Combine like terms: 0 + 0.875 = 0.875
0.25m + m2 = 0.875

The m term is 0.25m.  Take half its coefficient (0.125).
Square it (0.015625) and add it to both sides.

Add '0.015625' to each side of the equation.
0.25m + 0.015625 + m2 = 0.875 + 0.015625

Reorder the terms:
0.015625 + 0.25m + m2 = 0.875 + 0.015625

Combine like terms: 0.875 + 0.015625 = 0.890625
0.015625 + 0.25m + m2 = 0.890625

Factor a perfect square on the left side:
(m + 0.125)(m + 0.125) = 0.890625

Calculate the square root of the right side: 0.943729304

Break this problem into two subproblems by setting 
(m + 0.125) equal to 0.943729304 and -0.943729304.

Subproblem 1

m + 0.125 = 0.943729304 Simplifying m + 0.125 = 0.943729304 Reorder the terms: 0.125 + m = 0.943729304 Solving 0.125 + m = 0.943729304 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + m = 0.943729304 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + m = 0.943729304 + -0.125 m = 0.943729304 + -0.125 Combine like terms: 0.943729304 + -0.125 = 0.818729304 m = 0.818729304 Simplifying m = 0.818729304

Subproblem 2

m + 0.125 = -0.943729304 Simplifying m + 0.125 = -0.943729304 Reorder the terms: 0.125 + m = -0.943729304 Solving 0.125 + m = -0.943729304 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.125' to each side of the equation. 0.125 + -0.125 + m = -0.943729304 + -0.125 Combine like terms: 0.125 + -0.125 = 0.000 0.000 + m = -0.943729304 + -0.125 m = -0.943729304 + -0.125 Combine like terms: -0.943729304 + -0.125 = -1.068729304 m = -1.068729304 Simplifying m = -1.068729304

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.818729304, -1.068729304}

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