Is this simplifyable?

[kenhung123]

As

[TrueTears]

unless restrictions are applied.

[kenhung123]

But I thought the root of x^2 is the positive only?

[physics]

i think its simplifyable .... i think u should try it on the CAS calculator to see if it simplifys for you or type that equation as equalling the one u think it would and if it says true then it is ..if it says false well then its false >< i ope u get what i mean

[kyzoo]

As

>.< you would have lost tons of marks on last year's Methods exams if you did that

[kenhung123]

^

[superflya]

huh

thered be two cases wouldnt there?

[stonecold]

As

>.< you would have lost tons of marks on last year's Methods exams if you did that

true!

modulus x does not just equal x

[TrueTears]

But I thought the root of x^2 is the positive only?

u sure?

[kenhung123]

According to heinemann..

[TrueTears]

Also I'd like to put this question out there (where is the fallacy?)



But



Thus

[Think about multivalued roots!]

[simonhu81292]

i think it it's saying when only applied to certain situations in applications .. such that you can't have a neg answer...

[TrueTears]

Oh and I forgot to say the fallacy is beyond methods, don't worry if you can't understand why, it is not very important in VCE maths

[kenhung123]

i think it it's saying when only applied to certain situations in applications .. such that you can't have a neg answer...

But....how do they expect us to assume that...

[the.watchman]

Yeah,

BUT you can have