d^2+8d+56=0

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Solution for d^2+8d+56=0 equation:


Simplifying
d2 + 8d + 56 = 0

Reorder the terms:
56 + 8d + d2 = 0

Solving
56 + 8d + d2 = 0

Solving for variable 'd'.

Begin completing the square.

Move the constant term to the right:

Add '-56' to each side of the equation.
56 + 8d + -56 + d2 = 0 + -56

Reorder the terms:
56 + -56 + 8d + d2 = 0 + -56

Combine like terms: 56 + -56 = 0
0 + 8d + d2 = 0 + -56
8d + d2 = 0 + -56

Combine like terms: 0 + -56 = -56
8d + d2 = -56

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

Add '16' to each side of the equation.
8d + 16 + d2 = -56 + 16

Reorder the terms:
16 + 8d + d2 = -56 + 16

Combine like terms: -56 + 16 = -40
16 + 8d + d2 = -40

Factor a perfect square on the left side:
(d + 4)(d + 4) = -40

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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