Question

if x^2+y^2+z^2=16 and xy+yz+zx =10 find the value of x+y+z​

Answer 1

Answer:

x + y + z = 6

Step-by-step explanation:

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

=> (x + y + z)^2 = 16 + 2 × 10 = 16 + 20 = 36

=> x + y + z = Square root of 36

=> x + y + z = 6 answer.