Question

if x+y+z =10,X2+y2+z2 = 40 then find xy+yz+xz​

Answer 1

We know that ,

• [(x+y+z)^2=x^2+y^2+z^2+2xy+2yz+2xz]

So from ur given question :

(10)^2=40+2(xy+yz+zx)

=>60=2(xy+yz+zx)

Therefore xy+yz+zx=30 !!

Answer 2

Answer:

Step-by-step explanation: