Question

（4a+3a平方-3+3a立方）-（-a+4a立方）其中a=-2

帮忙了！谁能告诉我这题正确答案，我肯定选他（她）我急需

Answer 1

（4a+3a�0�5-3+3a�0�6）-（-a+4a�0�6）
=4a+3a�0�5-3+3a�0�6+a-4a�0�6
=-a�0�6+3a�0�5+5a-3
=-(-2)�0�6+3×(-2)�0�5+5×(-2)-3
=8+3×4-5×2-3
=7