Question

If 3 is one root of quadratic equation 5x + kx + 3 = 0, then k = -3/5(true or false)​

Answer 1

Answer:

False.

Step-by-step explanation:

We have: 3 is root of:

5x + kx + 3 = 0

Now, putting x = 3 in the equation,

5(3) + k(3) + 3 = 0

15 + 3 + 3k = 0

3k + 18 = 0

3k = - 18

k = - 6 ≠ -3/5