Question

(x-y)=5 , x² -y² =55 ആയാൽ y യുടെ വില എന്ത്?

• A. 8
• B. 3
• C. 5
• D. 7

Answer 1

Answer:

B. 3

x-y=5 , x²-y²= 55 → (x+y)(x-y)=55 (x+y) × 5 = 55 x+y = 11 y = {(x+y) - (x-y)}/2 = {11-5}/2 = 6/2 =3