(√7+√5)/(√7-√5)（分子分母同乘以（√7+√5)= (√7+√5)²/(7-5)= (7+5+2√35)/2= 6+√355＜√35＜6整数部分a = 6+5 = 11小数部分b = √35 - 5b+5 = √35 (b+5)²=35b²+10b+a+28 = (b+5)² + a...