Question

one
of the factors of x2+y2+2xy-z2?

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Answer 1

Answer:

X^2+y^2+2xy-(z)^2

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

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

Answer 2

(X2+y2+2xy)-z2
using identity (a+b)2=a2+b2+2ab
(x+y)2-z2
using Identity a2-b2= (a+b)(a-b)
(x+y+z)(x+y-z)