1 - a2 + 2ab - b2 এর উৎপাদক কোনটি?
Solution
Correct Answer: Option A
1 - a2 + 2ab - b2
= 1 -( a2 + 2ab - b2)
= 12-(a-b)2
= (1+a-b) (1 - a + b)
= 1 -( a2 + 2ab - b2)
= 12-(a-b)2
= (1+a-b) (1 - a + b)
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