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Question

Factorize :
(xy)38x3.

  1. 2(x+y)(7x24xy+y2)
  2. (xy)(x24xy+6y2)
  3. (x+2y)(x24xy+y2)
  4. (x+y)(7x24xy+y2)

A
(x+y)(7x24xy+y2)
B
(xy)(x24xy+6y2)
C
(x+2y)(x24xy+y2)
D
2(x+y)(7x24xy+y2)
Solution
Verified by Toppr

(xy)38x3
=(xy)3(2x)3
Using,
a3b3=(ab)(a2+b2+ab)
=(xy2x)((xy)2+(2x)2+(xy)2x)
=(yx)((x2+y22xy)+4x2+2x22xy)
=(x+y)(7x24xy+y2)

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