Factorise: 1 – 27x3 ok
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Rewrite 1 as 13 . Rewrite 27x3 27 x 3 as (3x)3 ( 3 x ) 3 . Since both terms are perfect cubes, factor using the difference of cubes formula, a3−b3=(a−b)(a2+ab+b2) a 3 - b 3 = ( a - b ) ( a 2 + a b + b 2 ) where a=1 and b=3x b = 3 x .
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Step-by-step explanation:
1-81
-80
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