Solutions To Quadratic Equations - Casio fx-3650P Programming Manual

04

Solutions to quadratic equations

The solutions to the quadratic equation
2
±
– b b
x = --------------------------------------
2a
In particular, when
when
when
ON MODE MODE
？→ Ａ：？→ Ｂ：？→ Ｃ：Ｂ
÷２ Ａ → Ｍ：Ｍ
i) Find solutions to the equation
Prog 1
EXE
2
4 EXE
EXE
1 6
EXE
– 4ac
2
b – 4ac > 0
two real solutions exist,
2
b – 4ac 0
= there is just one real solution and
2
b – 4ac < 0
there are two complex solutions
MODE
２
－４ ＡＣ ＝０⇒ Ｇｏｔｏ １： （－ Ｂ －√（Ｂ
Ｌｂｌ １： （－ Ｂ ＋√ （Ｂ
2
2x –
2
ax + bx + c = 0
PRGM
CMPLX
1
MODE
２
－４ ＡＣ） ） ÷２ Ａ → Ｍ：Ｍ ＜ 70 STEP ＞
(
4x – 16 = 0 x =
S A
S A
S A
S A M
S A M
are given by the formula:
2 1
)
– 2 4 ,
.
CMPLX P1 P1 P2 P3 P4
CMPLX P1 P1 P2 P3 P4
CMPLX P1 P1 P2 P3 P4
CMPLX P1 P1 P2 P3 P4
CMPLX P1 P1 P2 P3 P4
２
－４ ＡＣ） ）
D R G
D R G
D R G
D R G
Disp
D R G
<>
7