Question

find the sum or difference. write your answer in sta
$(z^2 + z) + (z^2 - 11)$

Explanation:

Step1: Eliminar paréntesis

$z^2 + z + z^2 - 11$

Step2: Agrupar términos semejantes

$(z^2 + z^2) + z - 11$

Step3: Sumar términos semejantes

$2z^2 + z - 11$

Answer:

$2z^2 + z - 11$