原式=ab(a+b),
当a+b=5,ab=3时,
则原式=3×5=15.
猜你喜欢
- 1谜语:what is it that fals often but never gets hurt?
- 2She has two new books(改为同义句)
- 3用化学方法区分苯甲醛,苯甲醇和苯甲酸
- 4you are right,you shouldn't beat him.
- 5以“学会欣赏”为题目写一篇800字作文
- 6"I hope i can pass the driving text at his first attempt.
- 7i think i have fallen in love for a long
- 8you can _(read) it tomorrow.
- 9函数f(x)=x2+2x,若f(x)>a在区间[1,3]上恒有解,则a的取值范围为_.
- 10我要一篇不少于350字的有关书的作文!