Math, asked by svyas4061, 1 year ago

Find the values of the x for which k2x2-2(k-1)x+4=0

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Answered by Adityasaxenaa
131
k2x2 – 2 (k – 1)x + 4 = 0


Sol. k2x2 – 2 (k – 1)x + 4 = 0


Comparing with ax2 + bx + c = 0 we have a = k2, b = – 2 (k – 1), c = 4


We know that,


∆  = b2 – 4ac


= [– 2 (k – 1)]2 – 4 (k2) (4)


= (– 2k + 2)2 – 16k2


= 4k2 – 8k + 4 – 16k2


= – 12k2 – 8k + 4


∵  The roots of given equation are real and equal.


∴ ∆  must be zero.


∴  – 12k2 – 8k + 4 = 0


∴  – 4 (3k2 + 2k – 1) = 0


∴   3k2 + 3k – k – 1 =  -0/4


∴  3k (k + 1) – 1 (k + 1) = 0


∴  (k + 1) (3k – 1) = 0


∴  k + 1 = 0 or 3k – 1 = 0


∴  k = – 1 or 3k = 1



∴ k = -1 or k = 1/3

Answered by 15aakashbest
58

Answer:

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