HP -22S Owner's Manual page 167

SOLVE Equation: SQRT< X-:- (X +.3) ) -.5=0
Keys: Display:
First, attempt to find a positive root.
o
ISTol
X
10.1
SOLVE
I
X=0.1000
Description:
Calculates the root us-
ing guesses 0 and 10.
Now, attempt to find a negative root by entering guesses 0 and -10.
o
ISTOI X
1
0
EtJ
.1r=S=OL--=-=VE:=-11
IRCLIX
SQRT(NEG)
X=-0.2381
Math error.
Displays the final esti-
mate of x.
The function is undefined for values of
x
between 0 and -0.3 since
those values produce a negative square root.
f(x)
-1
/ '
x
1
f(x)
V
x :
.3 - .5
B: More About Solving Equations 167