(m+7)(3m-5)-10=

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Solution for (m+7)(3m-5)-10= equation:


Simplifying
(m + 7)(3m + -5) + -10 = 0

Reorder the terms:
(7 + m)(3m + -5) + -10 = 0

Reorder the terms:
(7 + m)(-5 + 3m) + -10 = 0

Multiply (7 + m) * (-5 + 3m)
(7(-5 + 3m) + m(-5 + 3m)) + -10 = 0
((-5 * 7 + 3m * 7) + m(-5 + 3m)) + -10 = 0
((-35 + 21m) + m(-5 + 3m)) + -10 = 0
(-35 + 21m + (-5 * m + 3m * m)) + -10 = 0
(-35 + 21m + (-5m + 3m2)) + -10 = 0

Combine like terms: 21m + -5m = 16m
(-35 + 16m + 3m2) + -10 = 0

Reorder the terms:
-35 + -10 + 16m + 3m2 = 0

Combine like terms: -35 + -10 = -45
-45 + 16m + 3m2 = 0

Solving
-45 + 16m + 3m2 = 0

Solving for variable 'm'.

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

Divide each side by '3'.
-15 + 5.333333333m + m2 = 0

Move the constant term to the right:

Add '15' to each side of the equation.
-15 + 5.333333333m + 15 + m2 = 0 + 15

Reorder the terms:
-15 + 15 + 5.333333333m + m2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 5.333333333m + m2 = 0 + 15
5.333333333m + m2 = 0 + 15

Combine like terms: 0 + 15 = 15
5.333333333m + m2 = 15

The m term is 5.333333333m.  Take half its coefficient (2.666666667).
Square it (7.111111113) and add it to both sides.

Add '7.111111113' to each side of the equation.
5.333333333m + 7.111111113 + m2 = 15 + 7.111111113

Reorder the terms:
7.111111113 + 5.333333333m + m2 = 15 + 7.111111113

Combine like terms: 15 + 7.111111113 = 22.111111113
7.111111113 + 5.333333333m + m2 = 22.111111113

Factor a perfect square on the left side:
(m + 2.666666667)(m + 2.666666667) = 22.111111113

Calculate the square root of the right side: 4.702245327

Break this problem into two subproblems by setting 
(m + 2.666666667) equal to 4.702245327 and -4.702245327.

Subproblem 1

m + 2.666666667 = 4.702245327 Simplifying m + 2.666666667 = 4.702245327 Reorder the terms: 2.666666667 + m = 4.702245327 Solving 2.666666667 + m = 4.702245327 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2.666666667' to each side of the equation. 2.666666667 + -2.666666667 + m = 4.702245327 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + m = 4.702245327 + -2.666666667 m = 4.702245327 + -2.666666667 Combine like terms: 4.702245327 + -2.666666667 = 2.03557866 m = 2.03557866 Simplifying m = 2.03557866

Subproblem 2

m + 2.666666667 = -4.702245327 Simplifying m + 2.666666667 = -4.702245327 Reorder the terms: 2.666666667 + m = -4.702245327 Solving 2.666666667 + m = -4.702245327 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-2.666666667' to each side of the equation. 2.666666667 + -2.666666667 + m = -4.702245327 + -2.666666667 Combine like terms: 2.666666667 + -2.666666667 = 0.000000000 0.000000000 + m = -4.702245327 + -2.666666667 m = -4.702245327 + -2.666666667 Combine like terms: -4.702245327 + -2.666666667 = -7.368911994 m = -7.368911994 Simplifying m = -7.368911994

Solution

The solution to the problem is based on the solutions from the subproblems. m = {2.03557866, -7.368911994}

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