Question

225. Спростіть вра : 1 ) ( 15-3xy ) - ( 12x² - 5xy + y )
2 ) ( 5a³b - 12ab + 14ah ) - ( - 5ab + 14ab² - 7a³b ) ,
3 ) ( m + n - 2p ) - ( - 2m + p - 3n ) - ( 4m + 3m - 4p ) .

Answer 1

1) 15-3xy-12x2-5xy+y=15+2xy-12x2-y

2) 5a3b-12ab+14ah+5ab-14ab2+7a3b=12a3b-7ab+14ah-14ab2

3)m+h-2p+2m-p+3h-(7m-4p)=m+h-2p+2m-p+3h-7m+4p=-4m+h-2p-p+3h+4p=-4m+4h-2p-p+4p=-4m+4h+p