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Mathematics
Problem
Factorise
−
15
a
2
+
10
a
-15a^2+10a
−
15
a
2
+
10
a
completely. a)
5
a
(
3
a
−
2
)
5a(3a-2)
5
a
(
3
a
−
2
)
b)
−
5
a
(
3
a
−
2
)
-5a(3a-2)
−
5
a
(
3
a
−
2
)
c)
−
5
a
(
3
a
+
2
)
-5a(3a+2)
−
5
a
(
3
a
+
2
)
d)
−
3
a
(
5
a
−
2
)
-3a(5a-2)
−
3
a
(
5
a
−
2
)
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