Question

2a-6／4-4a+a平方除（a+3）乘Ａ平方+Ａ-6／3-a

Answer 1

2a-6／4-4a+a平方除（a+3）乘A平方+A-6／3-a

=2(a-3)/(a-2)^2÷（a+3）×(a+3)(a-2)/(3-a)

=-2(a-3)/(a-2)^2×1/(a+3)×(a+3)(a-2)/(a-3)

=-2/(a-2)

=2/(2-a)