(x²+y²-z²) ²-4x²y² factorise the following
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Step-by-step explanation:
(x2+y2−z2)2–(2xy)2
(x2+y2−z2+2xy)(x2+y2−z2–2xy)
(x2+2xy+y2−z2)(x2–2xy+y2−z2)
((x+y)2−z2)((x−y)2−z2)
(x+y+z)(x+y−z)(x−y−z)(x−y+z)