你可能感兴趣的试题
a2•a3=a6 (a+b)(a﹣2b)=a2﹣2b2 (ab3)2=a2b6 5a﹣2a=3
5a+2a=7a2 5a﹣2b=3ab 5a﹣2a=3 ﹣ab3+2ab3=ab3
2ab(b﹣2)+2a 2a(b2﹣2b) 2a(b+1)(b﹣1) 2a(b﹣1)2
a2﹣4b2 a2﹣2b2 a2+4b2 ﹣a2+4b2
(a4)3=a7 3(a﹣2b)=3a﹣2b a4+a4=a8 a5÷a3=a2
3AB2+B2=2C 2AB2 +2B 2 =2C 4AB 2+B.2=2C AB 2+2B 2=2C
2 5,则该反应的化学方程式为A. 2AB2 +B.2 == 2CB. 3AB2 +B.2 == 2C 4AB2 +B.2 == 2C AB2 + 4B2 == 2C