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Verified answer
I. 2a(2a - 6)= 4a^2 - 12a (salah)
II. (3a + 5) (3a - 5)
= 9a^2 - 15a + 15a - 25
= 9a^2 - 25 (benar)
III. (a - 3) (a + 4)
= a^2 + 4a - 3a - 12
= a^2 + a - 12 (benar)
IV. (2a - 5) (a + 2)
= 2a^2 + 4a - 5a - 10
= 2a^2 - a - 10 (salah)
peryataan yg benar adalah II dan III (C)
semoga membantu ^-^