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January 26, 2015

January 26, 2015

Posted by **maths rockzzz** on Thursday, October 20, 2011 at 8:57am.

- maths -
**Reiny**, Thursday, October 20, 2011 at 9:05amlet f(x) = 2x^4 - 3x^2 + 15x - 15k

if (2x-3) is a factor, then f(3/2) = 0

2(81/16) - 3(9/4) + 15(3/2) - 15k = 0

solve for k

then sub that value into 3k - √5k

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