Question

Can anybody help me with this?

Answer 1

Do I use the foil method... or?

Answer 2

you should know that (a+b)(a-b)=a^2-b^2.
now try to solve the question.

Answer 3

for (t^2-n^2) do I simplify it to (t-n)(t+n) ?

Answer 4

Multiply (t^2 - n^2) times (t^2 - n^2) and match the simplified product with one of the answer options. @RH

Answer 5

@RANE its not (t-n) on the second one, its (t+n)

Answer 6

@RANE t^4 - n^4 is NOT correct. Try again. You lost the middle term.

(t^2 - n^2) times (t^2 - n^2) = ?

Answer 7

there r no bracket once u simplify the ist 2 bracket directrix

Answer 8

ops my bad RH

Answer 9

NO W8!

Answer 10

I keep getting wrong answers!!!:( can someone explain?!

Answer 11

@RH it becomes -ve in the 2nd equation becoz when u times -ve and +ve = -ve

Answer 12

so there is no +ve left

Answer 13

@RH

The original problem is (t-n)(t+n)(t^2-n^2).
As some body above posted, the product of the first two is (t^2 - n^2).

So, (t-n)(t+n)(t^2-n^2) = (t^2 - n^2) (t^2 - n^2)

So, @RH, crank out (t^2 - n^2) (t^2 - n^2) and that's the answer.

Answer 14

hun?

Answer 15

@RANE What is a "+ve "

Answer 16

I got t^4 - t^2 n^2 - n^2 t^2 - n^4

Answer 17

@Directrix

Answer 18

Is A correct?

Answer 19

yes then u simplify it @RH

Answer 20

w8 its B

Answer 21

@RH Good. Now, collect like terms.

t^4 - t^2 n^2 - n^2 t^2 - n^4

t^4 - 2 n^2 t^2 - n^4

Answer 22

how did u get 2 @Directrix

Answer 23

and this answer is not in the choices

Answer 24

there is no 2

Answer 25

I see the answer in the choices. @RH Do you?

Answer 26

It is A right?

Answer 27

which option?

Answer 28

t^2-n^2=(t+n)(t-n)

substitute and multiply

Answer 29

where did u get 2 @RH

Answer 30

@RH > It is A right? YES, it is, @RH.

Answer 31

ans is c

Answer 32

thats wht i said

Answer 33

no rina it cant be

Answer 34

got it @RH

Answer 35

I am so confused right now!!!!!