Question

(x+y+z)(x+y-z) find the product​

Answer 1

I hope it's correct and helping to u

Answer 2

Answer:

x^2 + y^2 - z^2 + 2xy

Step-by-step explanation:

( x + y + z ) ( x + y - z )

= x ( x + y - z ) + y ( x + y - z ) + z ( x + y - z )

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

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

= x^2 + y^2 - z^2 + 2xy + 0 + 0

= x^2 + y^2 - z^2 + 2xy