If x = 2 and y = -1, which of the following expression is the greatest?

A x + y

B xy

C -x + y

D x - y - 1

Correct Answer: Option D

এখানে, x = 2 এবং y = -1

অপশন-
(ক) x + y = 2 + (-1) = 2 - 1 = 1

(খ) xy = 2.(-1) = -2

(গ) -x + y = -2 + (-1) = -2 - 1 = -3

(ঘ) x - y - 1 = 2 - (-1) - 1 = 2 + 1 - 1 = 2

∴ অপশন গুলোর মধ্যে (ঘ) বৃহত্তম।