AP ICET 2018 Afternoon Question Paper

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Question : 123 of 200

Marks: +1, -0

If

x^2-4

divides

x^{4}+ax^{3}+bx^{2}-5x+4

then

a-b=

$25/4$
$-15/4$
$12/5$
$-25/4$

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