¿en qué pronombres se cambia la "e" por "ie" en la raíz?

What is the discriminat of 3x^2+6x=2

What can you look through when you daydream?

"in english, write six to eight sentences comparing cultural aspects of greetings in spanish-speaking countries with greetings in your own culture. use what you learned in the lessons to tell about three differences and three similarities. discuss non-verbal greetings and how respect is shown. you may also include verbal greetings, but do not simply translate phrases from one language to another."