Problems Description
<p><br /> </p> <p>编写程序求方程<span style="font-size:xx-large;">ax<sup>2</sup>+bx+c=0</span>的根,a、b、c的值由键盘输入,假设<span style="font-size:x-large;">b<sup>2</sup>-4ac>0</span></p>
Input格式
<p>a b c</p>
Output格式
<p><br /> </p> <p>两items根,大数在前,小数在后</p>
Sample
Sample Input 1
1 -3 2
Sample Output 1
2 1
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