Question

(xy+3z)^2-(xy-3z)(xy-3z)simplify the following using a suitable identity. ans:12xyz,explain me.​

Answer 1

Answer:

(xy+3z)^2-(xy-3z)^2

Usind identity a^2- b^2= (a-b)(a+b)

here a= xy+3z. and b= xy-3z

(xy+3z+xy-3z)(xy+3z-xy+3z)

(2xy)(6z)

12xyz