If the lines represented by the equation `ax^(2)+2hxy+by^(2)+2gx+2fy+c=0` are equidistant from the origin, thenA. `f^(4)-g^(4)=c(bf^(2)-ag^(2))`B. `f^(4)-g^(4)=c(af^(2)-bg^(2))`C. `f^(4)-g^(4)=c(ag^(2)-bf^(2))`D. none of these

If the lines represented by the equation `ax^(2)+2hxy+by^(2)+2gx+2fy+c

1.	If the lines represented by the equation `ax^(2)+2hxy+by^(2)+2gx+2fy+c=0` are equidistant from the origin, thenA. `f^(4)-g^(4)=c(bf^(2)-ag^(2))`B. `f^(4)-g^(4)=c(af^(2)-bg^(2))`C. `f^(4)-g^(4)=c(ag^(2)-bf^(2))`D. none of these
Answer» Correct Answer - A

The lines represented by the equation `ax^(2)+2bxy+hy^(2)=0` are mutually perpendicular ifA. `a+b=0`B. `b+h=0`C. `h+a=0`D. `ah=-1`
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If acute angle between lines `ax^(2)+2hxy+by^(2)=0` is congruent to that between lines `2x^(2)-5xy+3y^(2)=0` and `k(h^(2)-ab)=(a+b)^(2)` then `k=`A. `-(10)^(2)`B. `(-10)^(2)`C. `-10`D. `10`
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The lines `a^2x^2+bcy^2=a(b+c)xy` will be coincident , ifA. `a=b`B. `b=c`C. `c=a`D. `b^(2)=ac`
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