m^2+18m+77=3

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Solution for m^2+18m+77=3 equation:


Simplifying
m2 + 18m + 77 = 3

Reorder the terms:
77 + 18m + m2 = 3

Solving
77 + 18m + m2 = 3

Solving for variable 'm'.

Reorder the terms:
77 + -3 + 18m + m2 = 3 + -3

Combine like terms: 77 + -3 = 74
74 + 18m + m2 = 3 + -3

Combine like terms: 3 + -3 = 0
74 + 18m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-74' to each side of the equation.
74 + 18m + -74 + m2 = 0 + -74

Reorder the terms:
74 + -74 + 18m + m2 = 0 + -74

Combine like terms: 74 + -74 = 0
0 + 18m + m2 = 0 + -74
18m + m2 = 0 + -74

Combine like terms: 0 + -74 = -74
18m + m2 = -74

The m term is 18m.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18m + 81 + m2 = -74 + 81

Reorder the terms:
81 + 18m + m2 = -74 + 81

Combine like terms: -74 + 81 = 7
81 + 18m + m2 = 7

Factor a perfect square on the left side:
(m + 9)(m + 9) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(m + 9) equal to 2.645751311 and -2.645751311.

Subproblem 1

m + 9 = 2.645751311 Simplifying m + 9 = 2.645751311 Reorder the terms: 9 + m = 2.645751311 Solving 9 + m = 2.645751311 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + m = 2.645751311 + -9 Combine like terms: 9 + -9 = 0 0 + m = 2.645751311 + -9 m = 2.645751311 + -9 Combine like terms: 2.645751311 + -9 = -6.354248689 m = -6.354248689 Simplifying m = -6.354248689

Subproblem 2

m + 9 = -2.645751311 Simplifying m + 9 = -2.645751311 Reorder the terms: 9 + m = -2.645751311 Solving 9 + m = -2.645751311 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + m = -2.645751311 + -9 Combine like terms: 9 + -9 = 0 0 + m = -2.645751311 + -9 m = -2.645751311 + -9 Combine like terms: -2.645751311 + -9 = -11.645751311 m = -11.645751311 Simplifying m = -11.645751311

Solution

The solution to the problem is based on the solutions from the subproblems. m = {-6.354248689, -11.645751311}

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