问题
解答题
化简:
(1)(-4x+2y)+(5x-3y)
(2)-(2m2-n2)-3(-m2+n2)
答案
(1)原式=-4x+2y+5x-3y=x-y;
(2)原式=-2m2+n2+3m2-3n2=m2-2n2
化简:
(1)(-4x+2y)+(5x-3y)
(2)-(2m2-n2)-3(-m2+n2)
(1)原式=-4x+2y+5x-3y=x-y;
(2)原式=-2m2+n2+3m2-3n2=m2-2n2