Question

by using suitable identity solve : ( 3x2 - y2 - z2) ( x4 + y4 +z4 + 3 x2 y2 - y2 z2 + 3 z2 x2)

Answer 1

u mean-      
   ( 3x² - y² -z² ) ( x⁴ + y⁴ + z⁴ + 3x²y² - y²z² + 3z²x² )