Put – b in place of b in identity (I). Do you get identity (II)?

1.	Put – b in place of b in identity (I). Do you get identity (II)?
Answer» Identity (I) is (a + b)² = a² + 2ab + b² We put – b in place of b {a + (- b)}² = a² + 2a (- b) + (- b)² = (a – b)² = a² – 2ab + b² Which is identity (II). Yes, we get identity (II).

Answer»

Identity (I) is

(a + b)² = a² + 2ab + b²

We put – b in place of b

{a + (- b)}² = a² + 2a (- b) + (- b)² = (a – b)² = a² – 2ab + b²

Which is identity (II). Yes, we get identity (II).

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