z^2+4z+16=0

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Solution for z^2+4z+16=0 equation:


Simplifying
z2 + 4z + 16 = 0

Reorder the terms:
16 + 4z + z2 = 0

Solving
16 + 4z + z2 = 0

Solving for variable 'z'.

Begin completing the square.

Move the constant term to the right:

Add '-16' to each side of the equation.
16 + 4z + -16 + z2 = 0 + -16

Reorder the terms:
16 + -16 + 4z + z2 = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 4z + z2 = 0 + -16
4z + z2 = 0 + -16

Combine like terms: 0 + -16 = -16
4z + z2 = -16

The z term is 4z.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4z + 4 + z2 = -16 + 4

Reorder the terms:
4 + 4z + z2 = -16 + 4

Combine like terms: -16 + 4 = -12
4 + 4z + z2 = -12

Factor a perfect square on the left side:
(z + 2)(z + 2) = -12

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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