Respuesta :

zrh2sfo

Answer:

z = -1

Step-by-step explanation:

Solve for z:

4 z^2 + 8 z + 4 = 0

Divide both sides by 4:

z^2 + 2 z + 1 = 0

Write the left hand side as a square:

(z + 1)^2 = 0

Take the square root of both sides:

z + 1 = 0

Subtract 1 from both sides:

Answer:  z = -1

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