Texas Instruments TI-82 Manual page 30

30
: (-B+ D)/(2A) → M
calculates one root and stores it as M
: Disp M
displays one root
: (-B- D)/(2A) → N
: Disp N
: Else
continues from here if the discriminant is not positive
: If D = 0
tests to see if the discriminant is zero
: Then
in case the discriminant is zero, continues on to the next line;
if the discriminant is not zero, jumps to the command after Else below
: Disp "DOUBLE ROOT"
displays a message in case there is a double root
: -B/(2A) → M
the quadratic formula reduces to
: Disp M
: Else
continues from here if the discriminant is not zero
: Disp "COMPLEX ROOTS"
displays a message in case the roots are complex numbers
: Disp "REAL PART"
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G T G
RAPHING ECHNOLOGY
((-) ALPHA B + 2nd
STO➧ ALPHA M ENTER
PRGM ► 3 ALPHA M ENTER
((-) ALPHA B – 2nd
STO➧ ALPHA N ENTER
PRGM ► 3 ALPHA N ENTER
PRGM 3 ENTER
PRGM 1 ALPHA D 2nd TEST 1 0 ENTER
PRGM 2 ENTER
PRGM ► 3 2nd A-LOCK " D O U B L E R O O T "
ENTER
(-) ALPHA B ÷ (2 ALPHA A) STO➧ ALPHA M ENTER
−
b
when D = 0
2 a
PRGM ► 3 ALPHA M ENTER
PRGM 3 ENTER
PRGM ► 3 2nd A-LOCK " C O M P L E X R O O T S "
ENTER
PRGM ► 3 2nd A-LOCK " R E A L
: TI-82
UIDE
ALPHA D) ÷ ( 2 ALPHA A )
ALPHA D) ÷ ( 2 ALPHA A )
P A R T " ENTER