Question

(x+y)² -4xy-9z² factorise​

Answer 1

SoluTion:-

→ (x+y)²-4xy-9z²

→ x²+y²+2xy-4xy-9z²

→ x²+y²-2xy-9z²

→ (x-y)²-9z²

Hope It Helps You ✌️