(m+4)(m+5)=-8

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Solution for (m+4)(m+5)=-8 equation:


Simplifying
(m + 4)(m + 5) = -8

Reorder the terms:
(4 + m)(m + 5) = -8

Reorder the terms:
(4 + m)(5 + m) = -8

Multiply (4 + m) * (5 + m)
(4(5 + m) + m(5 + m)) = -8
((5 * 4 + m * 4) + m(5 + m)) = -8
((20 + 4m) + m(5 + m)) = -8
(20 + 4m + (5 * m + m * m)) = -8
(20 + 4m + (5m + m2)) = -8

Combine like terms: 4m + 5m = 9m
(20 + 9m + m2) = -8

Solving
20 + 9m + m2 = -8

Solving for variable 'm'.

Reorder the terms:
20 + 8 + 9m + m2 = -8 + 8

Combine like terms: 20 + 8 = 28
28 + 9m + m2 = -8 + 8

Combine like terms: -8 + 8 = 0
28 + 9m + m2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-28' to each side of the equation.
28 + 9m + -28 + m2 = 0 + -28

Reorder the terms:
28 + -28 + 9m + m2 = 0 + -28

Combine like terms: 28 + -28 = 0
0 + 9m + m2 = 0 + -28
9m + m2 = 0 + -28

Combine like terms: 0 + -28 = -28
9m + m2 = -28

The m term is 9m.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9m + 20.25 + m2 = -28 + 20.25

Reorder the terms:
20.25 + 9m + m2 = -28 + 20.25

Combine like terms: -28 + 20.25 = -7.75
20.25 + 9m + m2 = -7.75

Factor a perfect square on the left side:
(m + 4.5)(m + 4.5) = -7.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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