问题
计算题
化简:(1)7a+3b﹣8﹣5a+2b
(2)4(2x2﹣xy)﹣(x2+xy﹣6)
答案
解:(1)原式=(7a﹣5a)+(3b+2b)﹣8
=2a+5b﹣8.
(2)原式=8x2﹣4xy﹣x2﹣xy+6
=7x2﹣5xy+6.
化简:(1)7a+3b﹣8﹣5a+2b
(2)4(2x2﹣xy)﹣(x2+xy﹣6)
解:(1)原式=(7a﹣5a)+(3b+2b)﹣8
=2a+5b﹣8.
(2)原式=8x2﹣4xy﹣x2﹣xy+6
=7x2﹣5xy+6.