a³茄毁穗b+2a²b²+ab³余蠢
=ab(a²+2ab+b²)
=ab(a+b)²
=2*（5）颤卜²
=2*25
=50
已知ab=2,a+b=5,求a三次方 b+2 a平方 b平方+a b立方
a³茄毁穗b+2a²b²+ab³余蠢
=ab(a²+2ab+b²)
=ab(a+b)²
=2*（5）颤卜²
=2*25
=50
a³茄毁穗b+2a²b²+ab³余蠢
=ab(a²+2ab+b²)
=ab(a+b)²
=2*（5）颤卜²
=2*25
=50
a³茄毁穗b+2a²b²+ab³余蠢
=ab(a²+2ab+b²)
=ab(a+b)²
=2*（5）颤卜²
=2*25
=50