Question

Factorise: 9x2 - 12ax - y2 – Z2 – 2yz + 4a2.​

Answer 1

Answer:

(3x-2a)²-(y+z)²

Step-by-step explanation:

(9x²-12ax+4a²)-(y²+z²+2yz)

(a+b)²=a²+b²+2ab

y²+z²+2yz=(y+z)²

(a-b)²=a²+b²-2ab

9x²-12ax+4a²=(3x-2a)²

Thus, (3x-2a)²-(y+z)²