4(a-1)^2-4(a-1)-3 plz telll
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4(a²+1-2a)-4a+4-3
= 4a²+4-8a-4a+4-3
= 4a²-8a+5
=4a²-4a-5a+5
=4a(a-1)-5(a-1)
=(4a-5)(a-1)
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