Question

Tutor question #2
Factor: x^4 -7x^2 +1
(conditions: pen, paper, no calculator, done in 2 minutes)
**

Answer 1

May be we can take x^2 as "t" & then factor

Answer 2

I mean\[(t^2-7t+1+5)-5\]

Answer 3

If my brain still works,
Then it becomes
(t-6)(t-1)-5
and then ..?

Answer 4

I should learn this :/

Answer 5

ya it is not going to be factor like this:/
May be @satellite can help us:)

Answer 6

It's @satellite73

Answer 7

And he's offline

Answer 8

oops sorry lol

Answer 9

so we made only this much\[(x^2-6)(x^2-1)-5.\]
now what should we do of {-5}?

Answer 10

I don't think we should do it in this way...

Answer 11

ya u r right @Callisto
But I m thinking more on this.

Answer 12

you need to use synthetic division

Answer 13

@bronzegoddess Can you further explain it?

Answer 14

x^2-6 @ParthKohli

Answer 15

@ParthKohli It's not like that.... and you made mistakes there too...

Answer 16

I deleted it before you noticed :P

Answer 17

lol

Answer 18

I noticed before you deleted :P

Answer 19

ya i too

Answer 20

This degree 4 is eating my head >.<

Answer 21

I m feeling giddy too

Answer 22

@maheshmeghwal9 can you call Yogesh please?

Answer 23

but he is sitting aside of me

Answer 24

we 3 are all here:)

Answer 25

Haha nice

Answer 26

okay, lets make a guess that (x-2) is a factor then we'll use synthetic division to actually se eif it one, its a trial and error method though: so according to this division(x-2) isnt a factor because it gives us a remainder 11.