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Anonymous
X2 - 4
= (x + 2)(x - 2)
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Wiki User
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What about it? Factorise it?
( x2 - 121 ) = (x + 11) times (x - 11)
(x - 5)(x + 4)
factorise (x-5)(x+4)=0 Hence x= 5 or -4
It is: x(x-3) factorized