初中分式计算题(X的平方-64Y的平方 )分之 2X 减去 (x-8Y) 分之 1 等于?
问题描述:
初中分式计算题
(X的平方-64Y的平方 )分之 2X 减去 (x-8Y) 分之 1 等于?
答
2x/(x^2-64y^2)-1/(x-8y)
=2x/[(x+8y)(x-8y)-1/(x-8y)
=1/(x+8y)+1/(x-8y)-1/(x-8y)
=1/(x+8y)
答
=2x/(x^2-64y^2)-(x+8y)/(x^2-64y^2)
=(x-8y)/(x^2-64y^2)
=1/(x+8y)