যদি x=1+2 এবং y=1-2 হয় তাহলে x2+y2 এর মান কত ?

A 12

B 6

C 8

D 10

Solution

Correct Answer: Option D

দেওয়া আছে, 
x= 1+2= 3 
⇒ x2 = 9

আবার, 
y = 1-2 = -1
⇒ y2 = 1


∴ x2+y2 = 9 + 1 = 10

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