Question

the equation 12x² +4kx+3has reap and equal roots. the value of k​

Answer 1

Step-by-step explanation:

b2-4ac= 0

(4k)^2 -4(12)(3)=0

(4k)^2-(12)^2=0

(4k)^2= 12^2

4k=12

k=3

Answer 2

Answer:

k = ±3

12x² + 4x +3

Since, roots are real and equal.

Discriminant D = 0 => b²- 4ac =0

Comparing the Equation with ax² + bx + c

a = 12 b = 4k c = 3

:. 4k² - 4 × 12× 3 = 0

16k² - 144 = 0

16k² = 144

=> k² = 9

.: k = ±√9 = ±3