Question

X square + Y square + Z square equal to 40 and xy + y z + 2 X + 30 find the value of x + Y + Z​

Answer 1

Answer:

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

=40+2(30)=100

x+y+z=√(100)=10