2m^2-6m-21=-3m^2+2

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Solution for 2m^2-6m-21=-3m^2+2 equation:


Simplifying
2m2 + -6m + -21 = -3m2 + 2

Reorder the terms:
-21 + -6m + 2m2 = -3m2 + 2

Reorder the terms:
-21 + -6m + 2m2 = 2 + -3m2

Solving
-21 + -6m + 2m2 = 2 + -3m2

Solving for variable 'm'.

Reorder the terms:
-21 + -2 + -6m + 2m2 + 3m2 = 2 + -3m2 + -2 + 3m2

Combine like terms: -21 + -2 = -23
-23 + -6m + 2m2 + 3m2 = 2 + -3m2 + -2 + 3m2

Combine like terms: 2m2 + 3m2 = 5m2
-23 + -6m + 5m2 = 2 + -3m2 + -2 + 3m2

Reorder the terms:
-23 + -6m + 5m2 = 2 + -2 + -3m2 + 3m2

Combine like terms: 2 + -2 = 0
-23 + -6m + 5m2 = 0 + -3m2 + 3m2
-23 + -6m + 5m2 = -3m2 + 3m2

Combine like terms: -3m2 + 3m2 = 0
-23 + -6m + 5m2 = 0

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

Divide each side by '5'.
-4.6 + -1.2m + m2 = 0

Move the constant term to the right:

Add '4.6' to each side of the equation.
-4.6 + -1.2m + 4.6 + m2 = 0 + 4.6

Reorder the terms:
-4.6 + 4.6 + -1.2m + m2 = 0 + 4.6

Combine like terms: -4.6 + 4.6 = 0.0
0.0 + -1.2m + m2 = 0 + 4.6
-1.2m + m2 = 0 + 4.6

Combine like terms: 0 + 4.6 = 4.6
-1.2m + m2 = 4.6

The m term is -1.2m.  Take half its coefficient (-0.6).
Square it (0.36) and add it to both sides.

Add '0.36' to each side of the equation.
-1.2m + 0.36 + m2 = 4.6 + 0.36

Reorder the terms:
0.36 + -1.2m + m2 = 4.6 + 0.36

Combine like terms: 4.6 + 0.36 = 4.96
0.36 + -1.2m + m2 = 4.96

Factor a perfect square on the left side:
(m + -0.6)(m + -0.6) = 4.96

Calculate the square root of the right side: 2.227105745

Break this problem into two subproblems by setting 
(m + -0.6) equal to 2.227105745 and -2.227105745.

Subproblem 1

m + -0.6 = 2.227105745 Simplifying m + -0.6 = 2.227105745 Reorder the terms: -0.6 + m = 2.227105745 Solving -0.6 + m = 2.227105745 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + m = 2.227105745 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + m = 2.227105745 + 0.6 m = 2.227105745 + 0.6 Combine like terms: 2.227105745 + 0.6 = 2.827105745 m = 2.827105745 Simplifying m = 2.827105745

Subproblem 2

m + -0.6 = -2.227105745 Simplifying m + -0.6 = -2.227105745 Reorder the terms: -0.6 + m = -2.227105745 Solving -0.6 + m = -2.227105745 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.6' to each side of the equation. -0.6 + 0.6 + m = -2.227105745 + 0.6 Combine like terms: -0.6 + 0.6 = 0.0 0.0 + m = -2.227105745 + 0.6 m = -2.227105745 + 0.6 Combine like terms: -2.227105745 + 0.6 = -1.627105745 m = -1.627105745 Simplifying m = -1.627105745

Solution

The solution to the problem is based on the solutions from the subproblems. m = {2.827105745, -1.627105745}

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