factorise (x-2)(x+2)+3
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Step-by-step explanation:
( x - 2) ( x + 2) + 3
Using identity (a + b) (a - b) = a^2 - b^2
= (x) ^2 - (2) ^2 + 3
= x^2 - 4 + 3
= x^2 - 1
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