x^4 - 7 = 6x^2
I get this far:
x^4 - 7 = 6x^2
x^4 + 0x^3 - 6x^2 + 0x - 7 = 0
Factors of -7:
+/- 1, +/- 7
I don't know where to go from this point.
The homework relates to solving polynomial equations using factor/remainder theorem. Can someone please help?