0.1m^2-1=0.4m

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Solution for 0.1m^2-1=0.4m equation:


Simplifying
0.1m2 + -1 = 0.4m

Reorder the terms:
-1 + 0.1m2 = 0.4m

Solving
-1 + 0.1m2 = 0.4m

Solving for variable 'm'.

Reorder the terms:
-1 + -0.4m + 0.1m2 = 0.4m + -0.4m

Combine like terms: 0.4m + -0.4m = 0.0
-1 + -0.4m + 0.1m2 = 0.0

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

Divide each side by '0.1'.
-10 + -4m + m2 = 0

Move the constant term to the right:

Add '10' to each side of the equation.
-10 + -4m + 10 + m2 = 0 + 10

Reorder the terms:
-10 + 10 + -4m + m2 = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -4m + m2 = 0 + 10
-4m + m2 = 0 + 10

Combine like terms: 0 + 10 = 10
-4m + m2 = 10

The m term is -4m.  Take half its coefficient (-2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
-4m + 4 + m2 = 10 + 4

Reorder the terms:
4 + -4m + m2 = 10 + 4

Combine like terms: 10 + 4 = 14
4 + -4m + m2 = 14

Factor a perfect square on the left side:
(m + -2)(m + -2) = 14

Calculate the square root of the right side: 3.741657387

Break this problem into two subproblems by setting 
(m + -2) equal to 3.741657387 and -3.741657387.

Subproblem 1

m + -2 = 3.741657387 Simplifying m + -2 = 3.741657387 Reorder the terms: -2 + m = 3.741657387 Solving -2 + m = 3.741657387 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + m = 3.741657387 + 2 Combine like terms: -2 + 2 = 0 0 + m = 3.741657387 + 2 m = 3.741657387 + 2 Combine like terms: 3.741657387 + 2 = 5.741657387 m = 5.741657387 Simplifying m = 5.741657387

Subproblem 2

m + -2 = -3.741657387 Simplifying m + -2 = -3.741657387 Reorder the terms: -2 + m = -3.741657387 Solving -2 + m = -3.741657387 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + m = -3.741657387 + 2 Combine like terms: -2 + 2 = 0 0 + m = -3.741657387 + 2 m = -3.741657387 + 2 Combine like terms: -3.741657387 + 2 = -1.741657387 m = -1.741657387 Simplifying m = -1.741657387

Solution

The solution to the problem is based on the solutions from the subproblems. m = {5.741657387, -1.741657387}

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