使下列等式成立x²+20x+_____=﹙x+_____﹚²
问题描述:
使下列等式成立x²+20x+_____=﹙x+_____﹚²
x²-5x+_____=﹙x-____﹚²
x²-1/3x+_____=﹙x-______﹚²
2x²-7x+_____=2﹙x-____﹚²
答
100 10
25/4 5/2
1/36 1/6
49/16 7/4