-9m^2+11m-2+4m^2-8m+7=

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Solution for -9m^2+11m-2+4m^2-8m+7= equation:


Simplifying
-9m2 + 11m + -2 + 4m2 + -8m + 7 = 0

Reorder the terms:
-2 + 7 + 11m + -8m + -9m2 + 4m2 = 0

Combine like terms: -2 + 7 = 5
5 + 11m + -8m + -9m2 + 4m2 = 0

Combine like terms: 11m + -8m = 3m
5 + 3m + -9m2 + 4m2 = 0

Combine like terms: -9m2 + 4m2 = -5m2
5 + 3m + -5m2 = 0

Solving
5 + 3m + -5m2 = 0

Solving for variable 'm'.

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

Divide each side by '-5'.
-1 + -0.6m + m2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -0.6m + 1 + m2 = 0 + 1

Reorder the terms:
-1 + 1 + -0.6m + m2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -0.6m + m2 = 0 + 1
-0.6m + m2 = 0 + 1

Combine like terms: 0 + 1 = 1
-0.6m + m2 = 1

The m term is -0.6m.  Take half its coefficient (-0.3).
Square it (0.09) and add it to both sides.

Add '0.09' to each side of the equation.
-0.6m + 0.09 + m2 = 1 + 0.09

Reorder the terms:
0.09 + -0.6m + m2 = 1 + 0.09

Combine like terms: 1 + 0.09 = 1.09
0.09 + -0.6m + m2 = 1.09

Factor a perfect square on the left side:
(m + -0.3)(m + -0.3) = 1.09

Calculate the square root of the right side: 1.044030651

Break this problem into two subproblems by setting 
(m + -0.3) equal to 1.044030651 and -1.044030651.

Subproblem 1

m + -0.3 = 1.044030651 Simplifying m + -0.3 = 1.044030651 Reorder the terms: -0.3 + m = 1.044030651 Solving -0.3 + m = 1.044030651 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + m = 1.044030651 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + m = 1.044030651 + 0.3 m = 1.044030651 + 0.3 Combine like terms: 1.044030651 + 0.3 = 1.344030651 m = 1.344030651 Simplifying m = 1.344030651

Subproblem 2

m + -0.3 = -1.044030651 Simplifying m + -0.3 = -1.044030651 Reorder the terms: -0.3 + m = -1.044030651 Solving -0.3 + m = -1.044030651 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '0.3' to each side of the equation. -0.3 + 0.3 + m = -1.044030651 + 0.3 Combine like terms: -0.3 + 0.3 = 0.0 0.0 + m = -1.044030651 + 0.3 m = -1.044030651 + 0.3 Combine like terms: -1.044030651 + 0.3 = -0.744030651 m = -0.744030651 Simplifying m = -0.744030651

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.344030651, -0.744030651}

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