(7m^2+3m-4)-(3m^2+9-5)=

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Solution for (7m^2+3m-4)-(3m^2+9-5)= equation:


Simplifying
(7m2 + 3m + -4) + -1(3m2 + 9 + -5) = 0

Reorder the terms:
(-4 + 3m + 7m2) + -1(3m2 + 9 + -5) = 0

Remove parenthesis around (-4 + 3m + 7m2)
-4 + 3m + 7m2 + -1(3m2 + 9 + -5) = 0

Reorder the terms:
-4 + 3m + 7m2 + -1(9 + -5 + 3m2) = 0

Combine like terms: 9 + -5 = 4
-4 + 3m + 7m2 + -1(4 + 3m2) = 0
-4 + 3m + 7m2 + (4 * -1 + 3m2 * -1) = 0
-4 + 3m + 7m2 + (-4 + -3m2) = 0

Reorder the terms:
-4 + -4 + 3m + 7m2 + -3m2 = 0

Combine like terms: -4 + -4 = -8
-8 + 3m + 7m2 + -3m2 = 0

Combine like terms: 7m2 + -3m2 = 4m2
-8 + 3m + 4m2 = 0

Solving
-8 + 3m + 4m2 = 0

Solving for variable 'm'.

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

Divide each side by '4'.
-2 + 0.75m + m2 = 0

Move the constant term to the right:

Add '2' to each side of the equation.
-2 + 0.75m + 2 + m2 = 0 + 2

Reorder the terms:
-2 + 2 + 0.75m + m2 = 0 + 2

Combine like terms: -2 + 2 = 0
0 + 0.75m + m2 = 0 + 2
0.75m + m2 = 0 + 2

Combine like terms: 0 + 2 = 2
0.75m + m2 = 2

The m term is 0.75m.  Take half its coefficient (0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
0.75m + 0.140625 + m2 = 2 + 0.140625

Reorder the terms:
0.140625 + 0.75m + m2 = 2 + 0.140625

Combine like terms: 2 + 0.140625 = 2.140625
0.140625 + 0.75m + m2 = 2.140625

Factor a perfect square on the left side:
(m + 0.375)(m + 0.375) = 2.140625

Calculate the square root of the right side: 1.463087489

Break this problem into two subproblems by setting 
(m + 0.375) equal to 1.463087489 and -1.463087489.

Subproblem 1

m + 0.375 = 1.463087489 Simplifying m + 0.375 = 1.463087489 Reorder the terms: 0.375 + m = 1.463087489 Solving 0.375 + m = 1.463087489 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + m = 1.463087489 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + m = 1.463087489 + -0.375 m = 1.463087489 + -0.375 Combine like terms: 1.463087489 + -0.375 = 1.088087489 m = 1.088087489 Simplifying m = 1.088087489

Subproblem 2

m + 0.375 = -1.463087489 Simplifying m + 0.375 = -1.463087489 Reorder the terms: 0.375 + m = -1.463087489 Solving 0.375 + m = -1.463087489 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-0.375' to each side of the equation. 0.375 + -0.375 + m = -1.463087489 + -0.375 Combine like terms: 0.375 + -0.375 = 0.000 0.000 + m = -1.463087489 + -0.375 m = -1.463087489 + -0.375 Combine like terms: -1.463087489 + -0.375 = -1.838087489 m = -1.838087489 Simplifying m = -1.838087489

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.088087489, -1.838087489}

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