(x+1)(x+4)=-8

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Solution for (x+1)(x+4)=-8 equation:


Simplifying
(x + 1)(x + 4) = -8

Reorder the terms:
(1 + x)(x + 4) = -8

Reorder the terms:
(1 + x)(4 + x) = -8

Multiply (1 + x) * (4 + x)
(1(4 + x) + x(4 + x)) = -8
((4 * 1 + x * 1) + x(4 + x)) = -8
((4 + 1x) + x(4 + x)) = -8
(4 + 1x + (4 * x + x * x)) = -8
(4 + 1x + (4x + x2)) = -8

Combine like terms: 1x + 4x = 5x
(4 + 5x + x2) = -8

Solving
4 + 5x + x2 = -8

Solving for variable 'x'.

Reorder the terms:
4 + 8 + 5x + x2 = -8 + 8

Combine like terms: 4 + 8 = 12
12 + 5x + x2 = -8 + 8

Combine like terms: -8 + 8 = 0
12 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-12' to each side of the equation.
12 + 5x + -12 + x2 = 0 + -12

Reorder the terms:
12 + -12 + 5x + x2 = 0 + -12

Combine like terms: 12 + -12 = 0
0 + 5x + x2 = 0 + -12
5x + x2 = 0 + -12

Combine like terms: 0 + -12 = -12
5x + x2 = -12

The x term is 5x.  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.
5x + 6.25 + x2 = -12 + 6.25

Reorder the terms:
6.25 + 5x + x2 = -12 + 6.25

Combine like terms: -12 + 6.25 = -5.75
6.25 + 5x + x2 = -5.75

Factor a perfect square on the left side:
(x + 2.5)(x + 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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