Question

If the equation 9x²+6kx+4=0 has equal roots then k=​

Answer 1

Answer:

2

Step-by-step explanation:

b^2=4ac

(6k)^2=4×4×9

36k^2=36×4

k^2=4

k=2

Answer 2

Answer:

k = 2

Step-by-step explanation:

9k^2 + 6kx + 4 = 0

this is (a+b)^2= a^2 +b^2 + 2ab form

so,

(3x)^2 + 2(3)(k)(x) + (2)^2 = 0

therefore, it is (3x+2)^2

without k it becomes, 9x^2 + 2(3x)(2) + (2)^2

hence k occupies the position of 2