Subject
Quantitative Aptitude
Topic
Solution
If x - y = 2 and xy = 3, then x + y =?
If x - y = 2 and xy = 3, then x + y =?
ক)
4খ)
-4গ)
16ঘ)
±4Explanation
(x – y)² = (x + y)² - 4xy ⇒ 2² = (x + y)² - 4 × 3 ⇒ (x + y)² = 12 + 4 ⇒ x + y = √16 ⇒ x + y = ± 4Related questions
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