(x+1)(x+5)+8=0

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Solution for (x+1)(x+5)+8=0 equation:


Simplifying
(x + 1)(x + 5) + 8 = 0

Reorder the terms:
(1 + x)(x + 5) + 8 = 0

Reorder the terms:
(1 + x)(5 + x) + 8 = 0

Multiply (1 + x) * (5 + x)
(1(5 + x) + x(5 + x)) + 8 = 0
((5 * 1 + x * 1) + x(5 + x)) + 8 = 0
((5 + 1x) + x(5 + x)) + 8 = 0
(5 + 1x + (5 * x + x * x)) + 8 = 0
(5 + 1x + (5x + x2)) + 8 = 0

Combine like terms: 1x + 5x = 6x
(5 + 6x + x2) + 8 = 0

Reorder the terms:
5 + 8 + 6x + x2 = 0

Combine like terms: 5 + 8 = 13
13 + 6x + x2 = 0

Solving
13 + 6x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-13' to each side of the equation.
13 + 6x + -13 + x2 = 0 + -13

Reorder the terms:
13 + -13 + 6x + x2 = 0 + -13

Combine like terms: 13 + -13 = 0
0 + 6x + x2 = 0 + -13
6x + x2 = 0 + -13

Combine like terms: 0 + -13 = -13
6x + x2 = -13

The x term is 6x.  Take half its coefficient (3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
6x + 9 + x2 = -13 + 9

Reorder the terms:
9 + 6x + x2 = -13 + 9

Combine like terms: -13 + 9 = -4
9 + 6x + x2 = -4

Factor a perfect square on the left side:
(x + 3)(x + 3) = -4

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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