m^2-8m-79=8

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Solution for m^2-8m-79=8 equation:


Simplifying
m2 + -8m + -79 = 8

Reorder the terms:
-79 + -8m + m2 = 8

Solving
-79 + -8m + m2 = 8

Solving for variable 'm'.

Reorder the terms:
-79 + -8 + -8m + m2 = 8 + -8

Combine like terms: -79 + -8 = -87
-87 + -8m + m2 = 8 + -8

Combine like terms: 8 + -8 = 0
-87 + -8m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '87' to each side of the equation.
-87 + -8m + 87 + m2 = 0 + 87

Reorder the terms:
-87 + 87 + -8m + m2 = 0 + 87

Combine like terms: -87 + 87 = 0
0 + -8m + m2 = 0 + 87
-8m + m2 = 0 + 87

Combine like terms: 0 + 87 = 87
-8m + m2 = 87

The m term is -8m.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8m + 16 + m2 = 87 + 16

Reorder the terms:
16 + -8m + m2 = 87 + 16

Combine like terms: 87 + 16 = 103
16 + -8m + m2 = 103

Factor a perfect square on the left side:
(m + -4)(m + -4) = 103

Calculate the square root of the right side: 10.148891565

Break this problem into two subproblems by setting 
(m + -4) equal to 10.148891565 and -10.148891565.

Subproblem 1

m + -4 = 10.148891565 Simplifying m + -4 = 10.148891565 Reorder the terms: -4 + m = 10.148891565 Solving -4 + m = 10.148891565 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + m = 10.148891565 + 4 Combine like terms: -4 + 4 = 0 0 + m = 10.148891565 + 4 m = 10.148891565 + 4 Combine like terms: 10.148891565 + 4 = 14.148891565 m = 14.148891565 Simplifying m = 14.148891565

Subproblem 2

m + -4 = -10.148891565 Simplifying m + -4 = -10.148891565 Reorder the terms: -4 + m = -10.148891565 Solving -4 + m = -10.148891565 Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + m = -10.148891565 + 4 Combine like terms: -4 + 4 = 0 0 + m = -10.148891565 + 4 m = -10.148891565 + 4 Combine like terms: -10.148891565 + 4 = -6.148891565 m = -6.148891565 Simplifying m = -6.148891565

Solution

The solution to the problem is based on the solutions from the subproblems. m = {14.148891565, -6.148891565}

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