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OpenStudy (anonymous):
Help Please. Which of the following is not a perfect square trinomial? A. 81 + 18y + y2 B. 144 + 24y + y2 C. 121 + 11y + y2 D. 100 – 20y + y2
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OpenStudy (anonymous):
If ax2+bx+c trinomial's discriminant equals 0 then it is a perfect square.
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