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Mathematics
Problem
Factorise completely
125
a
3
−
75
a
2
b
+
15
a
b
2
−
b
3
125a^{3}-75a^{2}b+15ab^{2}-b^{3}
125
a
3
−
75
a
2
b
+
15
a
b
2
−
b
3
.
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