(x+8)(x+8)+81=0

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Solution for (x+8)(x+8)+81=0 equation:


Simplifying
(x + 8)(x + 8) + 81 = 0

Reorder the terms:
(8 + x)(x + 8) + 81 = 0

Reorder the terms:
(8 + x)(8 + x) + 81 = 0

Multiply (8 + x) * (8 + x)
(8(8 + x) + x(8 + x)) + 81 = 0
((8 * 8 + x * 8) + x(8 + x)) + 81 = 0
((64 + 8x) + x(8 + x)) + 81 = 0
(64 + 8x + (8 * x + x * x)) + 81 = 0
(64 + 8x + (8x + x2)) + 81 = 0

Combine like terms: 8x + 8x = 16x
(64 + 16x + x2) + 81 = 0

Reorder the terms:
64 + 81 + 16x + x2 = 0

Combine like terms: 64 + 81 = 145
145 + 16x + x2 = 0

Solving
145 + 16x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '-145' to each side of the equation.
145 + 16x + -145 + x2 = 0 + -145

Reorder the terms:
145 + -145 + 16x + x2 = 0 + -145

Combine like terms: 145 + -145 = 0
0 + 16x + x2 = 0 + -145
16x + x2 = 0 + -145

Combine like terms: 0 + -145 = -145
16x + x2 = -145

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = -145 + 64

Reorder the terms:
64 + 16x + x2 = -145 + 64

Combine like terms: -145 + 64 = -81
64 + 16x + x2 = -81

Factor a perfect square on the left side:
(x + 8)(x + 8) = -81

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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