Question

answer please do it ​

Answer 1

=> x-y × x-y whole squared + y-z × y-z whole squared + x-x × z-x whole squared ÷ x - y × y - z × z - x

= x - y whole squared + y-z whole squared + z- x whole squared ÷ 15

=>(x-y)²+(y-z)²+(z-x)²÷15