tolong bantuannya ya ((:

1. 4y² - 17y +24 - (2y² + 15y - 18)
= 4y² - 2y² -17y -15y +24 + 18
= 2y² - 32y + 42
2. 4p - 11q - 9r - (-8p + 10q - 9r)
= 4p + 8p - 11q - 10q - 9r + 9r
= 12p - 21q