x(x+8)+18=0

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Solution for x(x+8)+18=0 equation:


Simplifying
x(x + 8) + 18 = 0

Reorder the terms:
x(8 + x) + 18 = 0
(8 * x + x * x) + 18 = 0
(8x + x2) + 18 = 0

Reorder the terms:
18 + 8x + x2 = 0

Solving
18 + 8x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-18' to each side of the equation.
18 + 8x + -18 + x2 = 0 + -18

Reorder the terms:
18 + -18 + 8x + x2 = 0 + -18

Combine like terms: 18 + -18 = 0
0 + 8x + x2 = 0 + -18
8x + x2 = 0 + -18

Combine like terms: 0 + -18 = -18
8x + x2 = -18

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = -18 + 16

Reorder the terms:
16 + 8x + x2 = -18 + 16

Combine like terms: -18 + 16 = -2
16 + 8x + x2 = -2

Factor a perfect square on the left side:
(x + 4)(x + 4) = -2

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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