z+10+z^2=-15

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Solution for z+10+z^2=-15 equation:


Simplifying
z + 10 + z2 = -15

Reorder the terms:
10 + z + z2 = -15

Solving
10 + z + z2 = -15

Solving for variable 'z'.

Reorder the terms:
10 + 15 + z + z2 = -15 + 15

Combine like terms: 10 + 15 = 25
25 + z + z2 = -15 + 15

Combine like terms: -15 + 15 = 0
25 + z + z2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-25' to each side of the equation.
25 + z + -25 + z2 = 0 + -25

Reorder the terms:
25 + -25 + z + z2 = 0 + -25

Combine like terms: 25 + -25 = 0
0 + z + z2 = 0 + -25
z + z2 = 0 + -25

Combine like terms: 0 + -25 = -25
z + z2 = -25

The z term is z.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
z + 0.25 + z2 = -25 + 0.25

Reorder the terms:
0.25 + z + z2 = -25 + 0.25

Combine like terms: -25 + 0.25 = -24.75
0.25 + z + z2 = -24.75

Factor a perfect square on the left side:
(z + 0.5)(z + 0.5) = -24.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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