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Answer:
I am not sure but I try
Explanation:
1 p²-p-16c²-4c
p(p -1) -4 c(4c+1)
(p- 4c) (p- 1) (4c+1)
2. x²-7x+7y-y²
x(x- 7) +y(7-y)
(x+y)(x- 7) (7 - y)
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