Activities
723
Deriving the Quadratic Formula
This activity shows you how to derive the quadratic formula:
x =
4. Use the
zeros( )
function to compute the
zeros of the first derivative of
c(w)
to find
the minimum value of
c(w)
.
Note:
The maximum length of the pole is
the minimum value of
c(w)
.
5. Compute the exact maximum length of
the pole.
Enter:
c
(
2 ±
)
6. Compute the approximate maximum
length of the pole.
Result: Approximately 20.8097 feet.
Note:
Use the auto-paste feature to copy
the result from step 4 to the entry line
inside the parentheses of c( ) and press
8 ¸
.
b
–
b
2
4
ac
–
±
2
a
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Summary of Contents for Titanium TI-89
Page 9: ...Getting Started 6 TI 89 Titanium keys Ë Ì Í Ê ...
Page 34: ...Getting Started 31 2 or D 2 B u s i n e s s D B D B Press Result ...
Page 43: ...Getting Started 40 3 0 D B D D B D Press Result ...
Page 44: ...Getting Started 41 D 2 0 0 2 D B Scroll down to October and press Press Result ...
Page 58: ...Getting Started 55 Example Set split screen mode to TOP BOTTOM Press Result 3 B D ...
Page 70: ...Getting Started 67 ...
Page 175: ...Operating the Calculator 172 From the Keyboard ...
Page 456: ...Tables 453 ...
Page 527: ...Data Matrix Editor 524 ...
