化简:y-3/4y-8÷(y+2-5/y-2).
问题描述:
化简:
÷(y+2-y-3 4y-8
).5 y-2
答
原式=
÷(y-3 4y-8
-(y+2)(y-2) y-2
)5 y-2
=
÷y-3 4y-8
=
y2-9 y-2
×y-3 4(y-2)
y-2 (y+3)(y-3)
=
1 4(y+3)
=
.1 4y+12