Question

simplify (x+y+z)(x+y-z)​

Answer 1

Answer:

x is answering job in VuhiVu

Answer 2

Answer:

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

[(x+y)+z][(x+y)-z]

using identity

${a}^{2} - {b \: }^{2} = (a + b)(a - b)$

this can be written as

${(x + y)}^{2} - {z}^{2}$

you can open the brackets to obtain

$( {x}^{2} + 2xy + {y}^{2}) - {z}^{2}$