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16-4 Step-by-Step Examples
Press to
evaluate the selection.
It remains to transform
and combine it
with . Follow the
same procedure as
undertaken a number of
times above. You will find that is equal to
, and so the final two terms cancel each other
out.
Hence the result is
Example 3 Given the expression :
• expand and reduce D
• factor D
• solve the equation and
• evaluate D for x = 5.
Solution: First, enter D using the Equation Writer:
3 X 1
2 81
Press to select
and to
expand the expression. This
gives:
312
63–
312
63
C 45=
D 3x 1–()
2
81–=
3x 10–()3x 8+()⋅ 0=
3X 1–()
2
9x
2
6x–181–+
hp40g+.book Page 4 Friday, December 9, 2005 1:03 AM