m(m-8)=7

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Solution for m(m-8)=7 equation:


Simplifying
m(m + -8) = 7

Reorder the terms:
m(-8 + m) = 7
(-8 * m + m * m) = 7
(-8m + m2) = 7

Solving
-8m + m2 = 7

Solving for variable 'm'.

Reorder the terms:
-7 + -8m + m2 = 7 + -7

Combine like terms: 7 + -7 = 0
-7 + -8m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -8m + 7 + m2 = 0 + 7

Reorder the terms:
-7 + 7 + -8m + m2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -8m + m2 = 0 + 7
-8m + m2 = 0 + 7

Combine like terms: 0 + 7 = 7
-8m + m2 = 7

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 = 7 + 16

Reorder the terms:
16 + -8m + m2 = 7 + 16

Combine like terms: 7 + 16 = 23
16 + -8m + m2 = 23

Factor a perfect square on the left side:
(m + -4)(m + -4) = 23

Calculate the square root of the right side: 4.795831523

Break this problem into two subproblems by setting 
(m + -4) equal to 4.795831523 and -4.795831523.

Subproblem 1

m + -4 = 4.795831523 Simplifying m + -4 = 4.795831523 Reorder the terms: -4 + m = 4.795831523 Solving -4 + m = 4.795831523 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 = 4.795831523 + 4 Combine like terms: -4 + 4 = 0 0 + m = 4.795831523 + 4 m = 4.795831523 + 4 Combine like terms: 4.795831523 + 4 = 8.795831523 m = 8.795831523 Simplifying m = 8.795831523

Subproblem 2

m + -4 = -4.795831523 Simplifying m + -4 = -4.795831523 Reorder the terms: -4 + m = -4.795831523 Solving -4 + m = -4.795831523 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 = -4.795831523 + 4 Combine like terms: -4 + 4 = 0 0 + m = -4.795831523 + 4 m = -4.795831523 + 4 Combine like terms: -4.795831523 + 4 = -0.795831523 m = -0.795831523 Simplifying m = -0.795831523

Solution

The solution to the problem is based on the solutions from the subproblems. m = {8.795831523, -0.795831523}

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