Texas Instruments TI-30XIIB Owners Manual - Page 44

Texas Instruments TI-30XIIB Manual

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Quadratic Equation For an equation m tne form ax' + bx + C V, t solutions for x are x = -b 2a Example: Find the roots of the equation 3r. + 8x + 5 - 0. Using the above equation: a = 3. b = 8. c = 5 x _-8 ' v18? - (4)(3)N 2x 3 Solving for the positive sign first Enter Press Display fOgl M 8 M _ 6.1 4 [X] 3 [g.] 5 F.4.1 M LCI 2 DE 3 =] 8 1 - 8. 2. E3 CI CI 2 -10. 2. 3 -1 6666667 Root 2 42

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Quadratic
Equation
For
an
equation
m
tne
form
ax'
+
bx
+
C
V,
t
solutions
for
x
are
-b
x
=
2a
Example:
Find
the
roots
of
the
equation
3r
.
+
8x
+
5
-
0.
Using
the
above
equation:
a
=
3.
b
=
8.
c
=
5
x
_-8
'
v1
8
?
-
(
4
)(
3
)N
2
x
3
Solving
for
the
positive
sign
first
Enter
Press
fOgl
M
Display
8
M
_
6.1
4
[X]
3
[g.]
5
F.4.1
M
LCI
2
DE
3
=]
1
8
-
8.
2.
E3 CI CI
-10.
2
2.
3
-1
6666667
Root
2
42