5m^2+8m+15=0

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Solution for 5m^2+8m+15=0 equation:


Simplifying
5m2 + 8m + 15 = 0

Reorder the terms:
15 + 8m + 5m2 = 0

Solving
15 + 8m + 5m2 = 0

Solving for variable 'm'.

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

Divide each side by '5'.
3 + 1.6m + m2 = 0

Move the constant term to the right:

Add '-3' to each side of the equation.
3 + 1.6m + -3 + m2 = 0 + -3

Reorder the terms:
3 + -3 + 1.6m + m2 = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 1.6m + m2 = 0 + -3
1.6m + m2 = 0 + -3

Combine like terms: 0 + -3 = -3
1.6m + m2 = -3

The m term is 1.6m.  Take half its coefficient (0.8).
Square it (0.64) and add it to both sides.

Add '0.64' to each side of the equation.
1.6m + 0.64 + m2 = -3 + 0.64

Reorder the terms:
0.64 + 1.6m + m2 = -3 + 0.64

Combine like terms: -3 + 0.64 = -2.36
0.64 + 1.6m + m2 = -2.36

Factor a perfect square on the left side:
(m + 0.8)(m + 0.8) = -2.36

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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