3. Factorise:
(i) (x2 - 2xy + y2) – z^2
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Answer:
Ok
Step-by-step explanation:
ANSWER
(x
2
−2xy+y
2
)−z
2
⇒[x(x−y)−y(x−y)]−z
2
⇒(x−y)(x−y)−z
2
⇒(x−y)
2
−z
2
⇒[(x−y)+z][(x−y)−z]
⇒(x−y+z)(x−y−z)
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