A) 9
B) 1
C) \[-9\]
D) zero
Correct Answer: C
Solution :
The given equation represents a pair of lines \[abc+2ghf-a{{f}^{2}}-h{{g}^{2}}-c{{h}^{2}}=0\] \[3(-1)k+2(3)-(-3)(1/2)-3({{3}^{2}})\] \[-(-1)-{{\left( -\frac{3}{2} \right)}^{2}}-k{{\left( \frac{1}{2} \right)}^{2}}=0\] \[-3k-\frac{9}{2}-27+\frac{9}{4}-\frac{k}{4}=0\] \[-12k-18-108+9-k=0\] \[\Rightarrow \] \[-13k=117\] \[k=-9\]You need to login to perform this action.
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