Question

x(x²+y²-z²)+y(-x²-y²+z²)-z(x²+y²-z²)
factorise the following
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Answer 1

x(x²+y²-z²)+y(-x²-y²+z²)-z(x²+y²-z²)

x(x²+y²-z²)+y×-1(x²+y²-z²)-z(x²+y²-z²)

x(x²+y²-z²)-y(x²+y²-z²)-z(x²+y²-z²)

(x-y-z)(x²+y²-z²)