-2的2次方÷(-2又4分之1)X(-3分之2)的2次方 =4除以(-1/2)x(4/9)=-4x2x(4/9)=32/9
(-2)² ÷﹙-2¼﹚×(-2/3)² =4÷﹙-9/4﹚× 4/9= -16/9× 4/9 =-64/81
=4/(-9/4)乘以(4/9)=-64/81