Question

answer the qestion with photos ​

Answer 1

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Answer 2

GOOD MORNING!!

( i ) 3x + 2y = 14

CUBING ON BOTH SIDE'S WE HAVE

(3x + 2y )³ = (14)³

(3x)³ + (2y)³ + 3(3x)(2y) ( 3x + 2y ) = 2744

Becoz ( a + b )³ = a³ + b³ + 3ab ( a + b )

27x³ + 8y³ + 18(xy) (14) = 2744

27x³ + 8y³ + 18(8)(14) = 2744

27x³ + 8y³ + 2016 = 2744

27x³ + 8y³ = 2744 - 2016

27x³ + 8y³ = 728

Therefore, 27x³ + 8y³ = 728