设a ⊙b 2a-3b+1,则2⊙3=
问题描述:
设a ⊙b 2a-3b+1,则2⊙3=
答
2⊙3
=2*2-3*3+1
=4-9+1
=-4
设a ⊙b 2a-3b+1,则2⊙3=
2⊙3
=2*2-3*3+1
=4-9+1
=-4