factorise by grouping a(a-4) -a+4
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a (a-4)-a+4
a (a-4)-1 (a-4)
(a-4)(a-1)
Hope it helps...
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eramneelofer:
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Answered by
1
Answer:
Step-by-step explanation:
a(a-4)-a+4
a(a-4)-1(a-4)
(a-1)(a-4)........ answer
hope this helps
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