Question

pls help
Find the following products by wing identities
i) 4x + 7/y
ii) (-3x + 4y²)
iii) (abc+ 7)²
iv) (2a-5b) (2a + 5b)
v )(a/6 + 5) (a/6 + 5)
vi (3xy-z)(3xy-z)
vii (p-6q)(p-6q)
viii (m/4-9)(m/4 + 9)
ix (2mn -1)(2mn-1)
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Answer 1

Answer:

answer is vi I am really sure.