Tolong cara nomor 7, jawaban saya salah. Terima kasih

Lim (2x^2 - 3)/(x^2 - 9)
= (2(3)^2 - 3)/(3^2 - 9)
= (18 - 3)/(9 - 9)
= 15/0
= ~

lim(2.3.3)-3/(3.3-9)
lim(18-3)/0
lim15/0
~ (e)