Q

LBL Q
4
×
R⬆
×
+/-
x<>y
ENTER
+/-
R⬇
x²
+
XEQ Q034
x<>y
2
×
ENTER
R⬇
÷
R⬇
x<>y
÷
x<>y
R⬇
ENTER
R⬇
x<>y
-
R⬇
+
R⬆
RTN
SQRT CK=F5B5
x<0?
GTO Q038
√x
RTN
+/-
√x
0i1
×
RTN

CK=42F7
LN=135

Routine QUADRATIC. Solves the quadratic eqaution ax²+bx+c=0. Push a, b and c 
onto the stack and call Q, it returns both solutions on the stack.

Public subroutines:
Q001 QUADRATIC is the only public subroutine.

Uses memory: none
Uses routines: none

Private subroutines:
SQRT calculates √x taking into account the complex case.