यदि x + y = 10 व xy = 16, तब x2 – xy + y2 व x2 + xy

1.	यदि x + y = 10 व xy = 16, तब x2 – xy + y2 व x2 + xy + y2 के मान ज्ञात कीजिए।
Answer» x² – xy + y² = x² + y² + 2xy – 3xy = (x + y)² – 3xy = (10)² – 48 = 100 – 48 = 52 x² + xy + y² = (x + y)² – xy = (10)² – 16 = 100 – 16 = 84

यदि x + y = 10 व xy = 16, तब x2 – xy + y2 व x2 + xy + y2 के मान ज्ञात कीजिए।

Answer»

x² – xy + y² = x² + y² + 2xy – 3xy

= (x + y)² – 3xy = (10)² – 48 = 100 – 48 = 52

x² + xy + y² = (x + y)² – xy

= (10)² – 16 = 100 – 16 = 84