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Determine 'k' if one of the roots of the equation k(x-1)^2 =

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Determine 'k' if one of the roots of the equation k(x-1)^2 = [#permalink] New post 30 Jan 2004, 13:10
Determine 'k' if one of the roots of the equation k(x-1)^2 = 5x-7 is double the other.

a)-2
b)2
c)25
d)both a and b
e) :angry
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 [#permalink] New post 30 Jan 2004, 14:31
thta's wat i call indian beauty.. but i didnt try to solve the prb yet.
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 [#permalink] New post 30 Jan 2004, 15:06
f = (x-a)(x-2a) = x^2 -3a x + 2a^2 x = 0

3a = (2k+5)/k
2a^2 = (k+7)/k

2(2k+5)^2/(9k^2) = (k+7)/k

8k^2 + 40k + 50 = 9k^2 + 63k
k^2 + 23k - 50 = 0
(k+25)(k-2) = 0

The other way is plug and play.
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 [#permalink] New post 04 Feb 2004, 02:10
2 is the answer
:2gunfire: :rocket
  [#permalink] 04 Feb 2004, 02:10
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Determine 'k' if one of the roots of the equation k(x-1)^2 =

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