Question

(1/4x-1/3y+z)²
expand fast ok I have exam

Answer 1

Answer:

By formula ( x + y + z) ²

which is x² + y² + z² + 2xy + 2yz + 2zx

or, x² + y² + z² + 2 ( xy + yz + zx)

( 1/4x )²+ ( – 1/3y )² + ( z )²

x²/ 16 + y²/9 + z² + 2xy / 12 + 2yz / 3 + 2zx / 4

x²/ 16 + y²/ 9 + z² + xy / 6 + 2yz / 3 + zx / 2