5m^2+72m=162

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Solution for 5m^2+72m=162 equation:


Simplifying
5m2 + 72m = 162

Reorder the terms:
72m + 5m2 = 162

Solving
72m + 5m2 = 162

Solving for variable 'm'.

Reorder the terms:
-162 + 72m + 5m2 = 162 + -162

Combine like terms: 162 + -162 = 0
-162 + 72m + 5m2 = 0

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

Divide each side by '5'.
-32.4 + 14.4m + m2 = 0

Move the constant term to the right:

Add '32.4' to each side of the equation.
-32.4 + 14.4m + 32.4 + m2 = 0 + 32.4

Reorder the terms:
-32.4 + 32.4 + 14.4m + m2 = 0 + 32.4

Combine like terms: -32.4 + 32.4 = 0.0
0.0 + 14.4m + m2 = 0 + 32.4
14.4m + m2 = 0 + 32.4

Combine like terms: 0 + 32.4 = 32.4
14.4m + m2 = 32.4

The m term is 14.4m.  Take half its coefficient (7.2).
Square it (51.84) and add it to both sides.

Add '51.84' to each side of the equation.
14.4m + 51.84 + m2 = 32.4 + 51.84

Reorder the terms:
51.84 + 14.4m + m2 = 32.4 + 51.84

Combine like terms: 32.4 + 51.84 = 84.24
51.84 + 14.4m + m2 = 84.24

Factor a perfect square on the left side:
(m + 7.2)(m + 7.2) = 84.24

Calculate the square root of the right side: 9.178235124

Break this problem into two subproblems by setting 
(m + 7.2) equal to 9.178235124 and -9.178235124.

Subproblem 1

m + 7.2 = 9.178235124 Simplifying m + 7.2 = 9.178235124 Reorder the terms: 7.2 + m = 9.178235124 Solving 7.2 + m = 9.178235124 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-7.2' to each side of the equation. 7.2 + -7.2 + m = 9.178235124 + -7.2 Combine like terms: 7.2 + -7.2 = 0.0 0.0 + m = 9.178235124 + -7.2 m = 9.178235124 + -7.2 Combine like terms: 9.178235124 + -7.2 = 1.978235124 m = 1.978235124 Simplifying m = 1.978235124

Subproblem 2

m + 7.2 = -9.178235124 Simplifying m + 7.2 = -9.178235124 Reorder the terms: 7.2 + m = -9.178235124 Solving 7.2 + m = -9.178235124 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '-7.2' to each side of the equation. 7.2 + -7.2 + m = -9.178235124 + -7.2 Combine like terms: 7.2 + -7.2 = 0.0 0.0 + m = -9.178235124 + -7.2 m = -9.178235124 + -7.2 Combine like terms: -9.178235124 + -7.2 = -16.378235124 m = -16.378235124 Simplifying m = -16.378235124

Solution

The solution to the problem is based on the solutions from the subproblems. m = {1.978235124, -16.378235124}

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