Question

For which values of k , the pair of linear equations ,
2x+y - 3=0 and 5x+ ky + 7 has no roots.​

Answer 1

Step-by-step explanation:

If the equation has no roots , then it must be of the form,

A1/A2 = B1/B2 not equal to C1/C2

From the given equations on substituting in the above equation , we get ,

2/5= 1/k not equal to -3/7

So, on cross - multiplication we get ,

k= 5/2..