Question

1. For what value of k, the equation have equal roots?
9x2 + 6kx + 4 = 0​

Answer 1

Answer:

k = +2

Step-by-step explanation:

9x2 + 6kx + 4 = 0

a = 9 , b = 6k , c = 4

D = b^2 - 4ac

0 = (6k)^2 - 4(9)(4)

0 = 36k^2 - 36(4)

0 = 36k^2 - 144

144 = 36 k^2

k^2 = 144

36

k^2 = 4

k = +2

Hope this helps you....