Question

34. Simplify: (x+y+z)-(x-y-z)?​

Answer 1

Answer:

x² -y² -z²

Step-by-step explanation:

(x+y+z) (x-y-z)

= x² -xy -xz +xy -y²-yz +zx -zy -z²

= x² -y² -z² + xy -xy +xz -xz -yz- yz

= x² -y² -z²

HOPE IT HELPS

Answer 2

Answer:

after opening the brackets x+y+z-x+y+z

then A/Q

+ - = -

therefore x- x = o

y-y= o

then z+z = 2z