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Mathematics
Mathematics
Problem
Factorise: a.
12
x
+
15
12x + 15
12
x
+
15
b.
14
m
−
21
14m - 21
14
m
−
21
c.
9
n
−
12
n
2
9n - 12n^2
9
n
−
12
n
2
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