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Q.

Simplify: (a2 − b2)2

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a

a4 + 2a2b2 + b4

b

a2 − 2ab + b2

c

a4 − 2a2b2 + b4

d

a2 + 2ab + b2

answer is A.

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Detailed Solution

(a2 − b2)2

= (a2)2 − 2 × a2 × b2 + (b2)2  [Using identity: (a − b)2 = a2 − 2ab + b2]

= a4 − 2a2b2 + b4

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