7m(3m-1)=4m+5

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Solution for 7m(3m-1)=4m+5 equation:


Simplifying
7m(3m + -1) = 4m + 5

Reorder the terms:
7m(-1 + 3m) = 4m + 5
(-1 * 7m + 3m * 7m) = 4m + 5
(-7m + 21m2) = 4m + 5

Reorder the terms:
-7m + 21m2 = 5 + 4m

Solving
-7m + 21m2 = 5 + 4m

Solving for variable 'm'.

Reorder the terms:
-5 + -7m + -4m + 21m2 = 5 + 4m + -5 + -4m

Combine like terms: -7m + -4m = -11m
-5 + -11m + 21m2 = 5 + 4m + -5 + -4m

Reorder the terms:
-5 + -11m + 21m2 = 5 + -5 + 4m + -4m

Combine like terms: 5 + -5 = 0
-5 + -11m + 21m2 = 0 + 4m + -4m
-5 + -11m + 21m2 = 4m + -4m

Combine like terms: 4m + -4m = 0
-5 + -11m + 21m2 = 0

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

Divide each side by '21'.
-0.2380952381 + -0.5238095238m + m2 = 0

Move the constant term to the right:

Add '0.2380952381' to each side of the equation.
-0.2380952381 + -0.5238095238m + 0.2380952381 + m2 = 0 + 0.2380952381

Reorder the terms:
-0.2380952381 + 0.2380952381 + -0.5238095238m + m2 = 0 + 0.2380952381

Combine like terms: -0.2380952381 + 0.2380952381 = 0.0000000000
0.0000000000 + -0.5238095238m + m2 = 0 + 0.2380952381
-0.5238095238m + m2 = 0 + 0.2380952381

Combine like terms: 0 + 0.2380952381 = 0.2380952381
-0.5238095238m + m2 = 0.2380952381

The m term is -0.5238095238m.  Take half its coefficient (-0.2619047619).
Square it (0.06859410431) and add it to both sides.

Add '0.06859410431' to each side of the equation.
-0.5238095238m + 0.06859410431 + m2 = 0.2380952381 + 0.06859410431

Reorder the terms:
0.06859410431 + -0.5238095238m + m2 = 0.2380952381 + 0.06859410431

Combine like terms: 0.2380952381 + 0.06859410431 = 0.30668934241
0.06859410431 + -0.5238095238m + m2 = 0.30668934241

Factor a perfect square on the left side:
(m + -0.2619047619)(m + -0.2619047619) = 0.30668934241

Calculate the square root of the right side: 0.553795398

Break this problem into two subproblems by setting 
(m + -0.2619047619) equal to 0.553795398 and -0.553795398.

Subproblem 1

m + -0.2619047619 = 0.553795398 Simplifying m + -0.2619047619 = 0.553795398 Reorder the terms: -0.2619047619 + m = 0.553795398 Solving -0.2619047619 + m = 0.553795398 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.2619047619' to each side of the equation. -0.2619047619 + 0.2619047619 + m = 0.553795398 + 0.2619047619 Combine like terms: -0.2619047619 + 0.2619047619 = 0.0000000000 0.0000000000 + m = 0.553795398 + 0.2619047619 m = 0.553795398 + 0.2619047619 Combine like terms: 0.553795398 + 0.2619047619 = 0.8157001599 m = 0.8157001599 Simplifying m = 0.8157001599

Subproblem 2

m + -0.2619047619 = -0.553795398 Simplifying m + -0.2619047619 = -0.553795398 Reorder the terms: -0.2619047619 + m = -0.553795398 Solving -0.2619047619 + m = -0.553795398 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.2619047619' to each side of the equation. -0.2619047619 + 0.2619047619 + m = -0.553795398 + 0.2619047619 Combine like terms: -0.2619047619 + 0.2619047619 = 0.0000000000 0.0000000000 + m = -0.553795398 + 0.2619047619 m = -0.553795398 + 0.2619047619 Combine like terms: -0.553795398 + 0.2619047619 = -0.2918906361 m = -0.2918906361 Simplifying m = -0.2918906361

Solution

The solution to the problem is based on the solutions from the subproblems. m = {0.8157001599, -0.2918906361}

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