〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y,其中x=-2,y=3

问题描述:

〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y,其中x=-2,y=3

〖(y-3x)(-3x-y)-9(x-2y)∧2〗÷3y
=〖(9x^2-y^2)-9(x-2y)∧2〗÷3y
=〖(36-9)-9(-8)∧2〗÷9

=〖27-9x64〗÷9
=〖3-64〗
=-61