Question

If x²+y²+z²=40 and xy+yz+zx=30 find x+y+z

Answer 1

hey mate here is your answer hope it is thankful

Answer 2

Answer:

answer is 10

Step-by-step explanation:

as

(x+y+z)^2=x^2+y^2+z^2+2(xy+yz+xz)

=40+2(30)

=100

so

x+y+z=10