Question

当m＞6时,化简m-1的绝对值 -3乘5-m的绝对值+ m-6的绝对值

Answer 1

1）｜m-1|-3*|5-m|+|m-6|=m-1-3m+15+m-6=-m+8

2)2（x²-y）+〔-x²+2（y+2x）-x²〕-（y-x)

=2x²-2y-x²+2y+4x-x²-y+x

=5x-y

=4x+y+x-2y

=5+(-3)

=2