Question

Factorise x2 + z2 + 2 xz - y2

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

X2 + z2 + 2xz - y2

= X2 + 2xz + z2 - y2

= ( X + z )2 - y2

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