factories a(a-4)-a+4
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Step-by-step explanation:
a²-4a-a+4=0
a²-5a+4=0
a²-4a-a+4=0
a=4
a=1
Answered by
0
Step-by-step explanation:
a2 - 4a - a + 4
a2 - 3a + 4
this is your answer
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