设多项式为X
X-(2ab+3bc+4)=2bc-1-2ab
x=2bc-1-2ab+2ab+3bc+4
x=5bc+3
正确结果应该是
x-(2ab-3bc+4)
=5bc+3-2ab+3bc-4
=8bc-2ab-1
答:正确结果应该是8bc-2ab-1
设多项式为X
X-(2ab+3bc+4)=2bc-1-2ab
x=2bc-1-2ab+2ab+3bc+4
x=5bc+3
正确结果应该是
x-(2ab-3bc+4)
=5bc+3-2ab+3bc-4
=8bc-2ab-1
答:正确结果应该是8bc-2ab-1