8m-m(m+3)=12

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Solution for 8m-m(m+3)=12 equation:


Simplifying
8m + -1m(m + 3) = 12

Reorder the terms:
8m + -1m(3 + m) = 12
8m + (3 * -1m + m * -1m) = 12
8m + (-3m + -1m2) = 12

Combine like terms: 8m + -3m = 5m
5m + -1m2 = 12

Solving
5m + -1m2 = 12

Solving for variable 'm'.

Reorder the terms:
-12 + 5m + -1m2 = 12 + -12

Combine like terms: 12 + -12 = 0
-12 + 5m + -1m2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
12 + -5m + m2 = 0

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + -5m + -12 + m2 = 0 + -12

Reorder the terms:
12 + -12 + -5m + m2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -5m + m2 = 0 + -12
-5m + m2 = 0 + -12

Combine like terms: 0 + -12 = -12
-5m + m2 = -12

The m term is -5m.  Take half its coefficient (-2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
-5m + 6.25 + m2 = -12 + 6.25

Reorder the terms:
6.25 + -5m + m2 = -12 + 6.25

Combine like terms: -12 + 6.25 = -5.75
6.25 + -5m + m2 = -5.75

Factor a perfect square on the left side:
(m + -2.5)(m + -2.5) = -5.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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