Question

15 Factorise : x^-y^ – 9z^ + 6yz​

Answer 1

Answer:

Step-by-step explanation:

we have to use this step:

x^2-(y^2-3z^2)^2=(x+y-3z).

(x-y+3z)

we should use

(a-b)^2and a^2-b^2