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AMC10 2005a Test Paper
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Sample Question 10:

There are two values of \(a\) for which the equation \(4x^2 + ax + 8x + 9 = 0\) has only one solution for \(x\). What is the sum of those values of \(a\)?

\(\mathrm{(A) \ } -16\qquad \mathrm{(B) \ } -8\qquad \mathrm{(C) \ } 0\qquad \mathrm{(D) \ } 8\qquad \mathrm{(E) \ } 20\)




Answer Keys

Question 10: A