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B
1
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C
x+yx−y
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D
0
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Solution
The correct option is Cx+yx−y Given 3y(x−y)−2x(y−2x)7x(x−y)−3(x2−y2) =3xy−3y2−2xy+4x27x2−7xy−3x2+3y2 =4x2+xy+3y24x2−7xy+3y2 =4x2+4xy−3xy−3y24x2−4xy−3xy+3y2 =4x(x+y)−3y(x+y)4x(x−y)−3y(x−y) =(4x−3y)(x+y)(4x−3y)(x−y) =x+yx−y