7
04
Solutions to quadratic equations
The solutions to the quadratic equation are given by the formula:
In particular, when two real solutions exist,
when
= there is just one real solution and
when there are two complex solutions
Program
?→ A:?→ B:?→ C:B
2
-4 AC =0⇒ Goto 1:(- B -√(B
2
-4 AC))
÷2 A → M:M Lbl 1:(-B+√(B
2
-4 AC))÷2 A → M:M < 70 STEP >
Execution Example:
i) Find solutions to the equation .
ax
2
bx c++ 0=
x
b– b
2
4ac–±
2a
--------------------------------------=
b
2
4ac–0>
b
2
4ac–0
b
2
4ac–0<
ON
MODE MODE MODE
1
PRGM
MODE
2
CMPLX
1
P1
2x
2
4x–16–0=x24,–=()
Prog
1
CMPLX
S A
D R
P1
P2 P3 P4
G
2
EXE
CMPLX
S A
D R
P1
P2 P3 P4
G
4
EXE
CMPLX
S A
D R
P1
P2 P3 P4
G
1 6
EXE
M CMPLX
Disp
S A
D R
P1
P2 P3 P4
G
EXE
M CMPLX
S A
D R
P1
P2 P3 P4
G
関数電卓事例集 .book 7 ページ 2002年9月2日 月曜日 午後6時51分