Question

class 9 .
plz ans this question
I really need it​

Answer 1

Answer:

a2 +b2 - 2ab

Step-by-step explanation:

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Answer 2

Answer:

(a³-b³)-(a-b)³

{(a-b)(a²+ab+b²)}- {a³-b³-3ab(a-b)}

(a³+a²b+ab²-ba²-ab²-b³)-(a³-b³-3a²b+3ab²)

a³+a²b-ba²-b³-a³+b³+3a²b-3ab²

a²b-ba²+3a²b- 3ab²