Question

xy+zx+y²-z²
Please write the correct answer otherwise I'll report you. And I reported many ppl so don't be over smart.​

Answer 1

Answer:

We have :  x2 + y2  + z2 - xy - yz - zy 

Now we  multiply by in whole equation and get

2 ( x2 + y2  + z2 - xy - yz - zx  )

⇒2 x2 + 2y2  + 2z2 - 2xy - 2yz - 2zx 

⇒ x2 + x2 +  y2  + y2  +  z2 + z2 - 2xy - 2yz - 2zx 

⇒ x2 +  y2  - 2xy  + y2  +  z2 - 2yz + z2 +  x2 - 2zx 

⇒ ( x - y )2 +  ( y - z )2 + ( z - x )2

Answer 2

Answer:

I HAVE PREPARED SLIDES FOR YOU.REFER IT

Step-by-step explanation:

the first photo means first step , second photo means second step and third photo has last step.