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Ananya Singh Baghel from DPS, NASIK , India
Subject :IMO    Class : Class 8

Factorise : (x - y)2 a2 + 2(x - y) (x + y) ab + b2 (x + y)2

A (ax - by) (ax + by)
B (ax + by) (bx + ay)
C (ax - ay + bx + by) (ax - ay + bx + by)
D (ax + ay + bx + by) (ax - ay + bx + by)


Ans 1:

Subhankar Mandal from Calcutta Boys Schoop, Kolkata
Class : Class 9
C Apply (a+b)^2=a^2+2ab+b^2

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