m^2+14m+49=20

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Solution for m^2+14m+49=20 equation:


Simplifying
m2 + 14m + 49 = 20

Reorder the terms:
49 + 14m + m2 = 20

Solving
49 + 14m + m2 = 20

Solving for variable 'm'.

Reorder the terms:
49 + -20 + 14m + m2 = 20 + -20

Combine like terms: 49 + -20 = 29
29 + 14m + m2 = 20 + -20

Combine like terms: 20 + -20 = 0
29 + 14m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-29' to each side of the equation.
29 + 14m + -29 + m2 = 0 + -29

Reorder the terms:
29 + -29 + 14m + m2 = 0 + -29

Combine like terms: 29 + -29 = 0
0 + 14m + m2 = 0 + -29
14m + m2 = 0 + -29

Combine like terms: 0 + -29 = -29
14m + m2 = -29

The m term is 14m.  Take half its coefficient (7).
Square it (49) and add it to both sides.

Add '49' to each side of the equation.
14m + 49 + m2 = -29 + 49

Reorder the terms:
49 + 14m + m2 = -29 + 49

Combine like terms: -29 + 49 = 20
49 + 14m + m2 = 20

Factor a perfect square on the left side:
(m + 7)(m + 7) = 20

Calculate the square root of the right side: 4.472135955

Break this problem into two subproblems by setting 
(m + 7) equal to 4.472135955 and -4.472135955.

Subproblem 1

m + 7 = 4.472135955 Simplifying m + 7 = 4.472135955 Reorder the terms: 7 + m = 4.472135955 Solving 7 + m = 4.472135955 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + m = 4.472135955 + -7 Combine like terms: 7 + -7 = 0 0 + m = 4.472135955 + -7 m = 4.472135955 + -7 Combine like terms: 4.472135955 + -7 = -2.527864045 m = -2.527864045 Simplifying m = -2.527864045

Subproblem 2

m + 7 = -4.472135955 Simplifying m + 7 = -4.472135955 Reorder the terms: 7 + m = -4.472135955 Solving 7 + m = -4.472135955 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + m = -4.472135955 + -7 Combine like terms: 7 + -7 = 0 0 + m = -4.472135955 + -7 m = -4.472135955 + -7 Combine like terms: -4.472135955 + -7 = -11.472135955 m = -11.472135955 Simplifying m = -11.472135955

Solution

The solution to the problem is based on the solutions from the subproblems. m = {-2.527864045, -11.472135955}

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