5m^2+3m=7

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Solution for 5m^2+3m=7 equation:


Simplifying
5m2 + 3m = 7

Reorder the terms:
3m + 5m2 = 7

Solving
3m + 5m2 = 7

Solving for variable 'm'.

Reorder the terms:
-7 + 3m + 5m2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + 3m + 5m2 = 0

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

Divide each side by '5'.
-1.4 + 0.6m + m2 = 0

Move the constant term to the right:

Add '1.4' to each side of the equation.
-1.4 + 0.6m + 1.4 + m2 = 0 + 1.4

Reorder the terms:
-1.4 + 1.4 + 0.6m + m2 = 0 + 1.4

Combine like terms: -1.4 + 1.4 = 0.0
0.0 + 0.6m + m2 = 0 + 1.4
0.6m + m2 = 0 + 1.4

Combine like terms: 0 + 1.4 = 1.4
0.6m + m2 = 1.4

The m term is 0.6m.  Take half its coefficient (0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
0.6m + 0.09 + m2 = 1.4 + 0.09

Reorder the terms:
0.09 + 0.6m + m2 = 1.4 + 0.09

Combine like terms: 1.4 + 0.09 = 1.49
0.09 + 0.6m + m2 = 1.49

Factor a perfect square on the left side:
(m + 0.3)(m + 0.3) = 1.49

Calculate the square root of the right side: 1.220655562

Break this problem into two subproblems by setting 
(m + 0.3) equal to 1.220655562 and -1.220655562.

Subproblem 1

m + 0.3 = 1.220655562 Simplifying m + 0.3 = 1.220655562 Reorder the terms: 0.3 + m = 1.220655562 Solving 0.3 + m = 1.220655562 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + m = 1.220655562 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + m = 1.220655562 + -0.3 m = 1.220655562 + -0.3 Combine like terms: 1.220655562 + -0.3 = 0.920655562 m = 0.920655562 Simplifying m = 0.920655562

Subproblem 2

m + 0.3 = -1.220655562 Simplifying m + 0.3 = -1.220655562 Reorder the terms: 0.3 + m = -1.220655562 Solving 0.3 + m = -1.220655562 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + m = -1.220655562 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + m = -1.220655562 + -0.3 m = -1.220655562 + -0.3 Combine like terms: -1.220655562 + -0.3 = -1.520655562 m = -1.520655562 Simplifying m = -1.520655562

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.920655562, -1.520655562}

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