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=(x-6)(x+8)
b) x²+10x+16
=(x+8)(x+2)
c) p²-9pq-10q²
d) 12+4x-x²
= x² -4x-12
=(x-6)(x+2)
e) 72-14x-x²
=x²+14x-72
=(x-4)(x+18)