Factorise : 27x3 + 125y3
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Step-by-step explanation:
a 3 + b 3 = ( a + b ) ( a 2− ab + b 2 ) where a =3 x and b= 5 y . ( 3 x+ 5 y ) ( 9 x 2 − 15 x y + 25 y 2 )
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