Question

The square root of x² + y² + Z² – 2xy + 2yz - 2zx is
a) x + y - z b) 5x – y + z c) x + y + z d) x - y - z​

Answer 1

Answer:

x + y + z

Step-by-step explanation:

we know that,

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

the square root of above term

= √( x + y + z )^2

= ( x + y +z)