(1/2x²+xy-1.5y²)/(x²-y²) 分子分母同时乘以2得 =(x²+2xy-3y²)/[2(x²-y²)] =[(x+3y)(x-y)]/[2(x+y)(x-y)] =(x+3y)/[2(x+y)] =(x+3y)/(2x+2y) 很高兴为您解答,【数学之美】团队为您答题. 请点击下面的【选为满意回答】按钮,
