下列合并同类项正确的是A.5xy^2-3xy^2=2 B.4ab^2-5ab^2=-ab^2 c.7m^2n-7mn^2=0 D.2x^2+3x^4=5x^6
问题描述:
下列合并同类项正确的是A.5xy^2-3xy^2=2 B.4ab^2-5ab^2=-ab^2 c.7m^2n-7mn^2=0 D.2x^2+3x^4=5x^6
答
4ab^2-5ab^2=-4-5)ab^2=-ab^2
选B.4ab^2-5ab^2=-ab^2
答
正确的是B
4ab^2-5ab^2=-ab^2