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Mathematics
Problem
After taking out the greatest common factor from
6
x
2
+
54
6x^{2}+54
6
x
2
+
54
, a student obtained
6
(
x
2
+
9
)
6(x^{2}+9)
6
(
x
2
+
9
)
. Explain in one sentence why the factorisation process should stop at this stage when using Class 9 methods.
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