1.

Factorise x2-a2-9b2+6ab​

Answer»

ANSWER:

X2-(a2+3b2-6ab)

x2-(a2+3b2-2×a×3b)

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

x2-(a-b)2

*a2-b2=(a+b)(a-b)

(X+a-b){x-(a-b)}

(x+a-b)(x-a+b)

ANS........



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