Question

If 3x-2y=13 and xy=5, then find the value of 27x³-8y³.

Answer 1

Answer:

Step-by-step explanation:

(27 x³ - 8 y³) = ( 3x)³ - (2y)³

= (3x - 2y) (9x²+ 4y² + 6xy)

= (3x  - 2y) {( 3x - 2y)² + 12 xy  + 6 xy)}

= (13) { (13)² + 18(5)}

=  13 ( 169 + 90)

= 3.367

Answer 2

Answer:

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