Question

if one zero of the quadratic polynomial (k-1)x+ + kx + lis-4 then find the value of k.
5. If the lines given by 3x + 2ky = 2 and 2x + 5y + 1 = 0 are parallel, then find the value of
k
+​

Answer 1

Answer:

Step-by-step explanation:

a  

1

​  

=3,b  

1

​  

=2k,c  

1

​  

=−2

a  

2

​  

=2,b  

2

​  

=5,c  

2

​  

=1

Since given lines are parallel

a  

2

​  

 

a  

1

​  

 

​  

=  

b  

2

​  

 

b  

1

​  

 

​  

 



=  

c  

2

​  

 

c  

1

​  

 

​  

 

∴  

2

3

​  

=  

5

2K

​  

 



=  

1

−2

​  

 

4K=15

K=  

4

15

​