1.

(x+y)² -4xy-9z² factorise​

Answer»

SOLUTION:-

→ (x+y)²-4xy-9z²

→ x²+y²+2xy-4xy-9z²

→ x²+y²-2xy-9z²

→ (x-y)²-9z²

Hope It HELPS You ✌️



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