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x+y=7 and a x^2+2h x y+a y^2=0,(a!=0) , ...

`x+y=7` and `a x^2+2h x y+a y^2=0,(a!=0)` , are three real distinct lines forming a triangle. Then the triangle is isosceles (b) scalene equilateral (d) right angled

A

isosceles

B

scalene

C

equilateral

D

right - angled

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The correct Answer is:
1
`ax^(2)+2hxy+ay^(2)=0`. Is symmetrical about `y=x`.
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