Answer:
Step-by-step explanation:
As no identity applies on this, we use distributive property, the property is:
(
a
+
b
)
(
c
+
d
)
=
a
(
c
+
d
)
+
b
(
c
+
d
)
Using that
2
(
5
+
6
b
)
+
5
b
(
5
+
6
b
)
Expand the brackets
10
+
12
b
+
25
b
+
30
b
2
Solve
10
+
37
b
+
30
b
2
