x2-y2 = (x - y)(x + y)
Algebraic identities useful factorisation
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Answer:
(x + y)
2
= x
2
+ 2xy + y
2
(x – y)
2
= x
2
– 2xy + y
2
x
2
– y
2
= (x + y) (x – y)
Step-by-step explanation:
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