3m^2-18m=7

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Solution for 3m^2-18m=7 equation:


Simplifying
3m2 + -18m = 7

Reorder the terms:
-18m + 3m2 = 7

Solving
-18m + 3m2 = 7

Solving for variable 'm'.

Reorder the terms:
-7 + -18m + 3m2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + -18m + 3m2 = 0

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

Divide each side by '3'.
-2.333333333 + -6m + m2 = 0

Move the constant term to the right:

Add '2.333333333' to each side of the equation.
-2.333333333 + -6m + 2.333333333 + m2 = 0 + 2.333333333

Reorder the terms:
-2.333333333 + 2.333333333 + -6m + m2 = 0 + 2.333333333

Combine like terms: -2.333333333 + 2.333333333 = 0.000000000
0.000000000 + -6m + m2 = 0 + 2.333333333
-6m + m2 = 0 + 2.333333333

Combine like terms: 0 + 2.333333333 = 2.333333333
-6m + m2 = 2.333333333

The m term is -6m.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6m + 9 + m2 = 2.333333333 + 9

Reorder the terms:
9 + -6m + m2 = 2.333333333 + 9

Combine like terms: 2.333333333 + 9 = 11.333333333
9 + -6m + m2 = 11.333333333

Factor a perfect square on the left side:
(m + -3)(m + -3) = 11.333333333

Calculate the square root of the right side: 3.366501646

Break this problem into two subproblems by setting 
(m + -3) equal to 3.366501646 and -3.366501646.

Subproblem 1

m + -3 = 3.366501646 Simplifying m + -3 = 3.366501646 Reorder the terms: -3 + m = 3.366501646 Solving -3 + m = 3.366501646 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + m = 3.366501646 + 3 Combine like terms: -3 + 3 = 0 0 + m = 3.366501646 + 3 m = 3.366501646 + 3 Combine like terms: 3.366501646 + 3 = 6.366501646 m = 6.366501646 Simplifying m = 6.366501646

Subproblem 2

m + -3 = -3.366501646 Simplifying m + -3 = -3.366501646 Reorder the terms: -3 + m = -3.366501646 Solving -3 + m = -3.366501646 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + m = -3.366501646 + 3 Combine like terms: -3 + 3 = 0 0 + m = -3.366501646 + 3 m = -3.366501646 + 3 Combine like terms: -3.366501646 + 3 = -0.366501646 m = -0.366501646 Simplifying m = -0.366501646

Solution

The solution to the problem is based on the solutions from the subproblems. m = {6.366501646, -0.366501646}

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