Question

simplify (x+y+z)(x+y-z)​

Answer 1

Answer:

x2+y2-z2+2xy

Step-by-step explanation:

1. x2+xy-xz+yx+y2-yz+zx+zy-z2
2. x2+y2-z2+2xy

Answer 2

(a+b) (a-b) a=x+y

=a sq-b sq b=2

=(x+y)sq - (2)sq

=x sq+y sq+ 2xy -2 sq