z^2=-8(z)-19

Solution for z^2=-8(z)-19 equation:

Simplifying
z2 = -8(z) + -19

Reorder the terms:
z2 = -19 + -8z

Solving
z2 = -19 + -8z

Solving for variable 'z'.

Reorder the terms:
19 + 8z + z2 = -19 + -8z + 19 + 8z

Reorder the terms:
19 + 8z + z2 = -19 + 19 + -8z + 8z

Combine like terms: -19 + 19 = 0
19 + 8z + z2 = 0 + -8z + 8z
19 + 8z + z2 = -8z + 8z

Combine like terms: -8z + 8z = 0
19 + 8z + z2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-19' to each side of the equation.
19 + 8z + -19 + z2 = 0 + -19

Reorder the terms:
19 + -19 + 8z + z2 = 0 + -19

Combine like terms: 19 + -19 = 0
0 + 8z + z2 = 0 + -19
8z + z2 = 0 + -19

Combine like terms: 0 + -19 = -19
8z + z2 = -19

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

Add '16' to each side of the equation.
8z + 16 + z2 = -19 + 16

Reorder the terms:
16 + 8z + z2 = -19 + 16

Combine like terms: -19 + 16 = -3
16 + 8z + z2 = -3

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

Can't calculate square root of the right side.

The solution to this equation could not be determined.