Question

please answer my questions as soon as possible because it is very important to me​

Answer 1

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we know that ,

x³ - y³ = ( x - y ) ( x² + xy + y² ) ..... ( 1 )

Given that ,,,

$\frac{({x}^{2}+{y}^{2})}{xy}=-1$

${x}^{2}+{y}^{2}=-xy$

x² + y² + xy = 0

Multiplying by ( x - y ) on both sides ,

( x² + y² + xy ) ( x - y ) = ( x - y ) ( 0 )

x³ - y³ = 0

Hence finded . ✌️✌️

Answer 2

Answer:

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