Question

If x-y = 2 , then the volue of x³-y³ -6xy is
(a) 7
(b) 8
(c) 9
(d) 10
Give me the write answer ​

Answer 1

Answer:

this answer is 9 this answer is correct

Answer 2

Answer:

8

Step-by-step explanation:

$= (x - y)(x {}^{2} + xy + y {}^{2} ) - 6xy$=

$= (x - y)( {x}^{2} - 2xy + 2xy + xy + y { }^{2} ) - 6xy \\ (x - y)( {(x - y)}^{2} + 3xy) - 6xy$=

$=2(2 {}^{2} + 3xy) - 6xy$

$= 8 + 6xy - 6xy$

$= 8$