Question

if x²+y²+z²=525 & xy+yz+zx=50 find x+y+z=?​

Answer 1

(X+y+z)^2= x2+y2+z2 +2(xy+yz+zx)

=525 +2 (50)

= 525+100

x+y+z =(625)^1/2= 25

Answer 2

Answer:

I hope it will help you.