m^2+20m=-70

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Solution for m^2+20m=-70 equation:


Simplifying
m2 + 20m = -70

Reorder the terms:
20m + m2 = -70

Solving
20m + m2 = -70

Solving for variable 'm'.

Reorder the terms:
70 + 20m + m2 = -70 + 70

Combine like terms: -70 + 70 = 0
70 + 20m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-70' to each side of the equation.
70 + 20m + -70 + m2 = 0 + -70

Reorder the terms:
70 + -70 + 20m + m2 = 0 + -70

Combine like terms: 70 + -70 = 0
0 + 20m + m2 = 0 + -70
20m + m2 = 0 + -70

Combine like terms: 0 + -70 = -70
20m + m2 = -70

The m term is 20m.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20m + 100 + m2 = -70 + 100

Reorder the terms:
100 + 20m + m2 = -70 + 100

Combine like terms: -70 + 100 = 30
100 + 20m + m2 = 30

Factor a perfect square on the left side:
(m + 10)(m + 10) = 30

Calculate the square root of the right side: 5.477225575

Break this problem into two subproblems by setting 
(m + 10) equal to 5.477225575 and -5.477225575.

Subproblem 1

m + 10 = 5.477225575 Simplifying m + 10 = 5.477225575 Reorder the terms: 10 + m = 5.477225575 Solving 10 + m = 5.477225575 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + m = 5.477225575 + -10 Combine like terms: 10 + -10 = 0 0 + m = 5.477225575 + -10 m = 5.477225575 + -10 Combine like terms: 5.477225575 + -10 = -4.522774425 m = -4.522774425 Simplifying m = -4.522774425

Subproblem 2

m + 10 = -5.477225575 Simplifying m + 10 = -5.477225575 Reorder the terms: 10 + m = -5.477225575 Solving 10 + m = -5.477225575 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + m = -5.477225575 + -10 Combine like terms: 10 + -10 = 0 0 + m = -5.477225575 + -10 m = -5.477225575 + -10 Combine like terms: -5.477225575 + -10 = -15.477225575 m = -15.477225575 Simplifying m = -15.477225575

Solution

The solution to the problem is based on the solutions from the subproblems. m = {-4.522774425, -15.477225575}

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