1 - a2 + 2ab – b2 এর উৎপাদক কোনটি?

1 - a² + 2ab – b² এর উৎপাদক কোনটি?

A (1 + a – b) (1 - a + b)

B (1 + a + b) (1 - a + b)

C (1 + a + b) (1 - a - b)

D (1 - a + b) (1 - a - b)

Solution

Correct Answer: Option A

1-a²+2ab-b²
=1-(a²-2ab+b²)
=1-(a-b)²
=(1+a-b)(1-a+b)