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Mathematics
Mathematics
Problem
Consider the expression involving two variables
a
a
a
and
b
b
b
. a. (i) Simplify
(
2
a
−
3
b
)
(
2
a
+
3
b
)
+
4
b
(
a
−
b
)
−
(
a
+
b
)
(
a
−
b
)
(2a - 3b)(2a + 3b) + 4b(a - b) - (a + b)(a - b)
(
2
a
−
3
b
)
(
2
a
+
3
b
)
+
4
b
(
a
−
b
)
−
(
a
+
b
)
(
a
−
b
)
. b. (ii) After simplification, find the coefficient of the term
a
b
ab
ab
.
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