5m(-2m+3)-7m=9

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Solution for 5m(-2m+3)-7m=9 equation:


Simplifying
5m(-2m + 3) + -7m = 9

Reorder the terms:
5m(3 + -2m) + -7m = 9
(3 * 5m + -2m * 5m) + -7m = 9
(15m + -10m2) + -7m = 9

Reorder the terms:
15m + -7m + -10m2 = 9

Combine like terms: 15m + -7m = 8m
8m + -10m2 = 9

Solving
8m + -10m2 = 9

Solving for variable 'm'.

Reorder the terms:
-9 + 8m + -10m2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 8m + -10m2 = 0

Begin completing the square.  Divide all terms by
-10 the coefficient of the squared term: 

Divide each side by '-10'.
0.9 + -0.8m + m2 = 0.0

Move the constant term to the right:

Add '-0.9' to each side of the equation.
0.9 + -0.8m + -0.9 + m2 = 0.0 + -0.9

Reorder the terms:
0.9 + -0.9 + -0.8m + m2 = 0.0 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + -0.8m + m2 = 0.0 + -0.9
-0.8m + m2 = 0.0 + -0.9

Combine like terms: 0.0 + -0.9 = -0.9
-0.8m + m2 = -0.9

The m term is -0.8m.  Take half its coefficient (-0.4).
Square it (0.16) and add it to both sides.

Add '0.16' to each side of the equation.
-0.8m + 0.16 + m2 = -0.9 + 0.16

Reorder the terms:
0.16 + -0.8m + m2 = -0.9 + 0.16

Combine like terms: -0.9 + 0.16 = -0.74
0.16 + -0.8m + m2 = -0.74

Factor a perfect square on the left side:
(m + -0.4)(m + -0.4) = -0.74

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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