(ah/a+h)²=1/4ah 怎样化简（a-h）²=0(ah/a+h)²=1/4ah 怎样化简（a-h）2=0

(ah/a+h)²=1/4ah 怎样化简（a-h）²=0(ah/a+h)²=1/4ah 怎样化简（a-h）2=0
(ah/a+h)²=1/4ah 怎样化简（a-h）²=0
(ah/a+h)²=1/4ah 怎样化简（a-h）2=0

(ah/a+h)²=1/4ah 怎样化简（a-h）²=0(ah/a+h)²=1/4ah 怎样化简（a-h）2=0
因为(ah/a+h)²=1/4ah
所以
(ah)² / (a+h)² = 1/4 ah
两边同时乘以 (a+h)² 除以 ah
得（a+h)²=4ah
a²+h²+2ah=4ah
a²+h²-2ah=0
所以（a—h）²=0