问题
解答题
化简计算:
(1)(4a2b-3ab)+(2ab-5a2b) (2)2(x-1)-(3x-5)-x.
答案
(1)(4a2b-3ab)+(2ab-5a2b)
=4a2b-3ab+2ab-5a2b
=(4a2b-5a2b)+(-3ab+2ab)
=-a2b-ab;
(2)2(x-1)-(3x-5)-x
=2x-2-3x+5-x
=(2x-3x-x)+(-2+5)
=-2x+3.
化简计算:
(1)(4a2b-3ab)+(2ab-5a2b) (2)2(x-1)-(3x-5)-x.
(1)(4a2b-3ab)+(2ab-5a2b)
=4a2b-3ab+2ab-5a2b
=(4a2b-5a2b)+(-3ab+2ab)
=-a2b-ab;
(2)2(x-1)-(3x-5)-x
=2x-2-3x+5-x
=(2x-3x-x)+(-2+5)
=-2x+3.