7 + 10 (x + y) - 8 (x + y) ²
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Answer:
let (x+y) be a
now
7 + 10a - 8a^2
7 + (14 - 4)a - 8a^2
7+ 14a - 4a -8a^2
7(1+ 2a) - 4a( 1+ 2a)
(7 - 4a) ( 1 + 2a)
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