5m^2+7m=-15

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Solution for 5m^2+7m=-15 equation:


Simplifying
5m2 + 7m = -15

Reorder the terms:
7m + 5m2 = -15

Solving
7m + 5m2 = -15

Solving for variable 'm'.

Reorder the terms:
15 + 7m + 5m2 = -15 + 15

Combine like terms: -15 + 15 = 0
15 + 7m + 5m2 = 0

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

Divide each side by '5'.
3 + 1.4m + m2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 1.4m + -3 + m2 = 0 + -3

Reorder the terms:
3 + -3 + 1.4m + m2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 1.4m + m2 = 0 + -3
1.4m + m2 = 0 + -3

Combine like terms: 0 + -3 = -3
1.4m + m2 = -3

The m term is 1.4m.  Take half its coefficient (0.7).
Square it (0.49) and add it to both sides.

Add '0.49' to each side of the equation.
1.4m + 0.49 + m2 = -3 + 0.49

Reorder the terms:
0.49 + 1.4m + m2 = -3 + 0.49

Combine like terms: -3 + 0.49 = -2.51
0.49 + 1.4m + m2 = -2.51

Factor a perfect square on the left side:
(m + 0.7)(m + 0.7) = -2.51

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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