Question

Factorise : 1 - 121x2​

Answer 1

Answer:

11x

Step-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 .

Answer 2

Step-by-step explanation:

first multiply by 121×2 so answer is 242

then subtract, 242-1 so answer is 241