Question

q19 please for online exam​

Answer 1

Answer:

$x^3 - y^3 = 0$

Step-by-step explanation:

Since, $\frac{x}{y} + \frac{y}{x} = -1$.

Take LCM and simplify the expression.

$\frac{x^2 + y^2}{xy} = -1.$        so,  $x^2 + y^2 = -xy$.

thus, $x^2 + y^2 +xy = 0.$

since ,$x^3 - y^3= (x-y)(x^2+y^2+xy)$

so $x^3-y^3 = (x-y)(0)$.     so, $x^3-y^3 = 0.$

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Answer 2

Answer:

x³-y³=0

Step-by-step explanation:

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