Question

verify the (x×y)-1=x-1 xy-1 when x =-2/3 and y -3/5 ans​

Answer 1

Step-by-step explanation:

x+y=2x−y=1

⟹x+yx−y=21

⟹(x+y)+(x−y)(x+y)−(x−y)=2+12−1using componendo-dividendo

⟹2x2y=3

⟹xy=3

Answer 2

Step-by-step explanation:

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