Question

( begin{aligned} H_{i} varphi & a=-2 b &=1 h &=frac{1}{2} end{aligned} mid begin{array}{l}c=k g=-5 / 2 f=frac{1}{2}end{array} )
[
96 c+2 n f g-9 f^{2}-6 g^{2}-c h^{2}=0
]
( -2 k+left(-frac{5}{4}right)-left(-frac{1}{2}right)-1left(frac{25}{4}right)-kleft(frac{1}{4}right)=0 )
( -2 k-frac{5}{4}+frac{1}{2}-frac{25}{4}-frac{k}{4}=0 )
[
begin{array}{c}
-8 k-5+2-25-k=0
-9 k=28
left.k=-frac{28}{9}right)
end{array}
]

# The value of k, so that the equation -2x2 + xy + y2 -5x + y + k = 0 may represent a pair of S straight line is + 2 vy0 (A) -2 icio ) none of these (B) 2

Solution