Question

八年级数学--分式的通分

1.将下列各式通分

(1) (2)

1 3 y+3 1 y-1

_____ , ______ _________ , _________,___________

a2-2a a2-4 y2-6y+9 2y+6 y2-9

Answer 1

(a+2)/a(a²-4);3a/a(a²-4);
2(y+3)²/2(y-3)²(y+3);(y-3)²/2(y-3)²(y+3);2(y-1)(y-3)/2(y-3)²(y+3);