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|dw:1336407343381:dw|

how can you factoriz x^2 -4 and x^2 -1 ?

know you this :a^2 -b^2 =(a-b)(a+b)

idk its just the question, and it doesn't say factorize, just multiply and simplify

yes i know but if you factoriz you will can easy simplify it

(x-2)(x+2) x+1
---------- * ----- =
(x-1)(x+1) x+2

can you continue ?

can you simplifie it now ?

no im stuck

so after you will simplifie these terms what will remain there ?

x-2
----
x-1
- these will remain - right ?