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If ax^(2)+2hxy+by^(2)+2gx+2fy+c=0 repres...

If `ax^(2)+2hxy+by^(2)+2gx+2fy+c=0` represents parallel straight lines, then

A

`ax^(2) + 2hxy + by^(2) = 0 `

B

`h(x^(2) - y^(2)) = (a - b) xy `

C

`bx^(2) - 2hxy + ay^(2) = 0 `

D

`(a + b)(x^(2) - y^(2)) = h (a - b) xy `

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The correct Answer is:
B
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