How do I write formula to conditional format using =if(and(or)

[Guest]

I need to compare the values in two cells, A1 and B1, I wish to put the
conditional formating on cell b1.

I need to determine if A1<0 and B1>0 or if A1>0 and B1<0.

If either of these two conditions occur, I need the cell of b1 to turn yellow.

I have tried using =if(and(a1<0,b1>0), =if(or(and(a1>0,b1<0), ???????

Any assistance would be appreciated.

Thanks! Don

 

[Guest]

try:

Formula is: =OR(AND(A1<0,B1>0),AND(A1>0,B1<0))

HTH

 

[Guest]

try
=A1*B1<0

 

[Guest]

This solution is so simple, yet it is brilliant and obvious. Thank you ever
so much!

Don

 

[Guest]

Thank you for your response. This solution did not work. Perhaps I mis
kedyed it. Another response of =A1*b1<0 did work.
Thank you for your response.

Don