Question

Using suitable identity, factorise 27p³-64r³

Answer 1

Answer:

27P^3+36P^2R-48R^2P-64R^3

Step-by-step explanation:

Answer 2

Answer:

( 3p - 4r ) ( 9p² + 12pr + 16r² )

Step-by-step explanation:

= 27p³ - 64r³

= ( 3p )³ - ( 4r )³

using formula

a³ - b³ = ( a - b ) ( a² + ab + b² )

= ( 3p )³ - ( 4r )³ = ( 3p - 4r ) ( (3p)² + (3p) (4r) + (4r)² )

                         = ( 3p - 4r ) ( 9p² + 12pr + 16r² )

                         

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