Answer :

49 X 7y6 + 56 X 4y8
= 7 X 7 X 7y6 + 7 X 8 X 4y8
= 7y6 (7 X 7 + 8 X 4y2)
= 7y6 (49 + 32y2)
lipi
ans is 7x4y6(7x3+8y2)

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