Question

If 5n²+2n+k=0, if one root is (-3) find the value of 'K'?
A) 6 B) 39 C) 45 D) - 39​

Answer 1

Answer:

given ,

root is -3

5n²+2n+k=0

substituting value of n

5*-3^2+2*-3+k=0

5*9-6+k=0

45-6+k=0

39+k=0

k= -39

Answer 2

Answer:

k = -51

Step-by-step explanation:

n=3

thus 5*3*3+2*3+k=0

=> 45+6+k=0

=> k = (-51)