Question

Maths ques.frm quadratic eq.

Answer 1

Answer:

k = 0, k = 3

Step-by-step explanation:

Given,

• D = 0 ( roots are real and equal)
• The equation: 3kx^2 - 4kx + 4 = 0

W.K.T:

D = b^2 - 4ac = 0

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

16k^2 - 16(3k) = 0

16k^2 - 16(3k) = 0

k^2 - 3k = 0

k(k - 3) = 0

» k = 0, k =3

Verification:

9x^2 - 12x + 4 = 0

(9x-6)(9x-6) = 0

x = 2/3, 2/3 (real and equal roots)