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2 Answers

 (4-5y)-2(3.5y-8)(4-5y)-2(3.5y-8).

Factorise:

(4-5y)(1-7y+16)-7y+16,

(4-5y)(17-7y)-7y+16,

68-28y-85y+35y²-7y+16,

35y²-(28+85+7)y+16,

35y²-120y+16.

by Top Rated User (719k points)

(4−5y)−2(3.5y−8) (4−5y)−2(3.5y−8)=

4-5y-2(14y-32-40y-17.5y^2)-7y+16=

4-5y-28y+64-80y+35y^2-7y+16=

35y^2-5y-28y-80y-7y+4+64+16=

35y^2-120y+84=

35y^2-35y-84y+84-y=

35y(y-1)-84(y-1)-y=

(35y-84)(y-1)-y

 

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