(1)x^2-25/2x-10=(X-5)(X+5)/2(X-5)=(X+5)/2
(2)2x-y/4x^2-4xy+y^2=2X-Y/(2X-Y)^2=1/(X-Y)
(3)第三道题目条件好像没看懂,还有后面的式子是(a^2-ab+b^2)/(a^2+b^2)还是a^2-ab+(b^2/a^2+b^2)
(1)x^2-25/2x-10=(X-5)(X+5)/2(X-5)=(X+5)/2
(2)2x-y/4x^2-4xy+y^2=2X-Y/(2X-Y)^2=1/(X-Y)
(3)第三道题目条件好像没看懂,还有后面的式子是(a^2-ab+b^2)/(a^2+b^2)还是a^2-ab+(b^2/a^2+b^2)