Subject
NSI নিয়োগ
Topic
জাতীয় নিরাপত্তা গোয়েন্দা সংস্থা (NSI) (সহকারী পরিচালক) - ০৮.১০.২০২১
If a2− b2= 20; a + b = 5, What is the Value of a − b?
If a2− b2= 20; a + b = 5, What is the Value of a − b?
ক)
3খ)
15গ)
5ঘ)
4Explanation
a 2 − b 2 = 20 Or, (a + b) (a - b) = 20 Or, 5 × (a - b) = 20 Or, a - b = 20/(a + b) = 20/5 = 4Related questions
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