290
E
E
x
x
p
p
a
a
n
n
d
d
i
i
n
n
g
g
p
p
o
o
l
l
y
y
n
n
o
o
m
m
i
i
a
a
l
l
s
s
Expand the expressions below.
(i)
(
)
4
2
3
x
+
(ii)
(
)
5
3
2
a
b
−
(i) Use
POLYFORM((2X+3)^4,X)
to
expand the polynomial. Use the
key to examine the result.
Result:
4
3
2
16
96
216
216
81
x
x
x
x
+
+
+
+
(ii) Use
POLYFORM((3A-2B)^5,B)
to
expand the polynomial as a function
of
B
. Then use the polynomial
function again,
ing the result
from the first expansion and
expanding this time as a function of
A
. The
key can then be used
to view it, using the left and right
arrows to scroll the screen left and
right.
Result:
5
4
3
2
2
3
4
5
243
810
1080
720
240
32
a
a b
a b
a b
ab
b
−
+
−
+
−
