Factoring Quadratics

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Routine Summary

A program that factors a quadratic using the inspection method.

Inputs

A,B,C

Outputs

L₁

Variables Used

A,B,C,P,F,L,N,M,J,O,I,L₁

Calculator Compatibility

TI-83/84/+/SE

Author

b2jammer

Download

quadfact.zip

:Prompt A,B,C
:AC→P:A→F:C→L
:1→N:1→M
:If (P<0) or (B<0):Then
:-1→N
:-1→M
:End
:For(J,M,N*abs(P),N)
:J+(J=0)→J
:If fPart(P/J)=0 and (P/J)+J=B:Then
:J→I
:(P/J)→O
:N*abs(P)→J
:End
:End
:{0,0,0,0→L1
:1-2(F<0)
:Ansgcd(abs(F),abs(O→L1(1
:1-2(I<0)
:Ansgcd(abs(I),abs(L→L1(2
:1-2(F<0 xor A<0)
:Ansgcd(abs(F),abs(I→L1(3
:1-2(O<0 xor B<0)
:Ansgcd(abs(O),abs(L→L1(4
:Disp "(AX+B)(CX+D)
:Disp "{A,B,C,D}
:(L1(1)L1(3)=A)
:Ans(L1(1)L1(4)+L1(2)L1(3)=B)
:Ans(L1(2)L1(4)=C)
:AnsL1

A program that takes the coefficients of a quadratic function and factors it using the Factoring by Inspection method, storing the new coefficients to L₁.

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