题目

阅读理解         Wang Fang is my friend. She is of medium build. She is not as tall as me. But she is heavier than me. She has long curly hair. She often tells us jokes and makes us laugh. She is very funny.         We are in the same class. She gets up at six every day. Then she does morning exercises. She has breakfast at six thirty. Then she goes to school at seven o'clock. She often walks to school. Sometimes she goes to school by bike.         Wang Fang likes swimming, skating, table tennis and basketball. After school, she often plays basketball with her 若关于x的方程 x2+4x-a+3=0有实数根．（1）求a的取值范围；（2）若a为符合条件的最小整数，求此时方程的根．