Question

Find the following product :(2x – y + 3z) (4x2 + y2 + 9z2 + 2xy + 3yz – 6xz)

Answer 1

Answer:

8x^3 - y^3 + 27z^3 + 18xyz

Step-by-step explanation:

--Identity Used =  - 3xyz

if x^3 + y^3 +z^3 = 0

x = 2x  

y = -y

z = 3z

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

= 8x^3 - y^3 +27z^3 + 18xyz