Factoring a trinomial to the fourth power using the ac method

3x^4 - x^2 - 24

[lolslim]

I noticed you put x^2 on -24, but there isn't x^2 on the -3 or the positive 8 outside the rectangle, did you put x^2 on the -24 by accident or did I miss something?

[callieb]

Okay but how do you do it if you are trying to multiply to 1080 and add to -67? Is there an easier way?