Factorise : 1 - 121x2 – InterviewSolution

1.	Factorise : 1 - 121x2
Answer» 11xStep-by-step explanation:REWRITE 1 as 12 . Rewrite 121x2 121 x 2 as (11x)2 ( 11 x ) 2 . Since both terms are perfect squares, FACTOR using the DIFFERENCE of squares formula, a2−b2=(a+B)(a−b) a 2 - b 2 = ( a + b ) ( a - b ) where a=1 and b=11x b = 11 x .

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