00:01
Hello, so here we are given the equation, well, x to the fourth plus two x squared plus one is equal to zero.
00:11
So we can factor this as x squared and then times x squared plus one plus one times x squared plus one equals zero.
00:22
We can then factor out a common factor of x squared plus one, and then this is going to be equal to x squared plus one, times x squared plus one equals zero.
00:33
Okay, so now we have two factors equal to zero.
00:35
So we could set either factor equal to zero.
00:38
But wait a minute, x squared plus one, x squared for any value of x, either positive or negative, x squared is never negative, right? the smallest x would be is zero.
00:48
Then we're adding one...