TS EAMCET · Maths · Straight Lines
If the product of the lengths of the perpendiculars drawn from the point \((-1,5)\) to the pair of lines \(2 x^2-x y+k y^2+6 x+y+4=0\) is \(\frac{65}{\sqrt{26}}\), then \(37 k^2+92 k\) is equal to
- A 56
- B 53
- C 57
- D 55
Answer & Solution
Correct Answer
(C) 57
Step-by-step Solution
Detailed explanation
As, we know that, the general equation of second degree \(a x^2+2 h x y+b y^2+2 g x+2 f y+c=0\) represents a pair of straight lines if and only if \(\Delta=0\). Where…
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