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If in the general quadratic equation f(x...

If in the general quadratic equation `f(x,y)=0,Delta=0` and `h^2=ab`, then the equation represents.

A

two parallel straight lines

B

two perpendicular straight lines

C

two coincident lines

D

None of the above

Text Solution

Verified by Experts

The correct Answer is:
A
The general quadratic equation `f(x,y)=ax^2+2hxy+by^2+2gx+2fy+c=0`....(i)
Given, `Delta=0`
`rArr` Eq.(i) represents pair of straight lines and
`therefore` Equation represents two parallel lines.
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